15157980 has 36 divisors (see below), whose sum is σ = 45979752. Its totient is φ = 4042080.

The previous prime is 15157969. The next prime is 15157993. The reversal of 15157980 is 8975151.

15157980 is a `hidden beast` number, since 1 + 5 + 1 + 579 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41926 + ... + 42285.

Almost surely, 2^15157980 is an apocalyptic number.

15157980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15157980 is an abundant number, since it is smaller than the sum of its proper divisors (30821772).

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

15157980 is a wasteful number, since it uses less digits than its factorization.

15157980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84226 (or 84221 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 15157980 is about 3893.3250570688. The cubic root of 15157980 is about 247.4839903939.

The spelling of 15157980 in words is "fifteen million, one hundred fifty-seven thousand, nine hundred eighty".