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153980 = 2257699
BaseRepresentation
bin100101100101111100
321211012222
4211211330
514411410
63144512
71210631
oct454574
9254188
10153980
11a5762
1275138
1355118
1440188
1530955
hex2597c

153980 has 12 divisors (see below), whose sum is σ = 323400. Its totient is φ = 61584.

The previous prime is 153953. The next prime is 153991. The reversal of 153980 is 89351.

It is a congruent number.

It is an unprimeable number.

153980 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3830 + ... + 3869.

It is an arithmetic number, because the mean of its divisors is an integer number (26950).

2153980 is an apocalyptic number.

153980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153980 is an abundant number, since it is smaller than the sum of its proper divisors (169420).

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

153980 is a wasteful number, since it uses less digits than its factorization.

153980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7708 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 153980 is about 392.4028542200. The cubic root of 153980 is about 53.5987636159.

The spelling of 153980 in words is "one hundred fifty-three thousand, nine hundred eighty".

Divisors: 1 2 4 5 10 20 7699 15398 30796 38495 76990 153980