15942980 has 36 divisors (see below), whose sum is σ = 34206060. Its totient is φ = 6241728.

The previous prime is 15942977. The next prime is 15943001. The reversal of 15942980 is 8924951.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 5026564 = 3304^2 + 2242^2 .

It is a super-2 number, since 2×15942980² = 508357222560800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69506 + ... + 69734.

Almost surely, 2^15942980 is an apocalyptic number.

15942980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15942980 is an abundant number, since it is smaller than the sum of its proper divisors (18263080).

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

15942980 is a wasteful number, since it uses less digits than its factorization.

15942980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 15942980 is about 3992.8661385025. The cubic root of 15942980 is about 251.6845174440.

The spelling of 15942980 in words is "fifteen million, nine hundred forty-two thousand, nine hundred eighty".