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239151980 = 225293147283
BaseRepresentation
bin11100100000100…
…10101101101100
3121200000011211202
432100102231230
5442210330410
635421505032
75632521044
oct1620225554
9550004752
10239151980
11112aa4471
1268112178
133a714b62
1423a94724
1515edeca5
hexe412b6c

239151980 has 96 divisors (see below), whose sum is σ = 549642240. Its totient is φ = 87171840.

The previous prime is 239151973. The next prime is 239152013. The reversal of 239151980 is 89151932.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844919 + ... + 845201.

It is an arithmetic number, because the mean of its divisors is an integer number (5725440).

Almost surely, 2239151980 is an apocalyptic number.

239151980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 239151980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274821120).

239151980 is an abundant number, since it is smaller than the sum of its proper divisors (310490260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

239151980 is a wasteful number, since it uses less digits than its factorization.

239151980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 239151980 is about 15464.5394370476. The cubic root of 239151980 is about 620.7136942662.

The spelling of 239151980 in words is "two hundred thirty-nine million, one hundred fifty-one thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 29 31 47 58 62 94 116 124 145 155 188 235 283 290 310 470 566 580 620 899 940 1132 1363 1415 1457 1798 2726 2830 2914 3596 4495 5452 5660 5828 6815 7285 8207 8773 8990 13301 13630 14570 16414 17546 17980 26602 27260 29140 32828 35092 41035 42253 43865 53204 66505 82070 84506 87730 133010 164140 169012 175460 211265 254417 266020 385729 412331 422530 508834 771458 824662 845060 1017668 1272085 1542916 1649324 1928645 2061655 2544170 3857290 4123310 5088340 7714580 8246620 11957599 23915198 47830396 59787995 119575990 239151980