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190380980 = 2259519049
BaseRepresentation
bin10110101100011…
…11101110110100
3111021020100121102
423112033232310
5342214142410
630520305232
74501132406
oct1326175664
9437210542
10190380980
1198513059
1253912218
1330599c8a
141b3dab76
1511aa92a5
hexb58fbb4

190380980 has 12 divisors (see below), whose sum is σ = 399800100. Its totient is φ = 76152384.

The previous prime is 190380941. The next prime is 190380989. The reversal of 190380980 is 89083091.

It can be written as a sum of positive squares in 2 ways, for example, as 61058596 + 129322384 = 7814^2 + 11372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190380989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4759505 + ... + 4759544.

It is an arithmetic number, because the mean of its divisors is an integer number (33316675).

Almost surely, 2190380980 is an apocalyptic number.

190380980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190380980 is an abundant number, since it is smaller than the sum of its proper divisors (209419120).

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

190380980 is a wasteful number, since it uses less digits than its factorization.

190380980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9519058 (or 9519056 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 190380980 is about 13797.8614284968. The cubic root of 190380980 is about 575.2736995662.

The spelling of 190380980 in words is "one hundred ninety million, three hundred eighty thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 9519049 19038098 38076196 47595245 95190490 190380980