15996988 has 12 divisors (see below), whose sum is σ = 31994032. Its totient is φ = 6855840.

The previous prime is 15996971. The next prime is 15996997. The reversal of 15996988 is 88969951.

15996988 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 285633 + ... + 285688.

Almost surely, 2^15996988 is an apocalyptic number.

It is an amenable number.

15996988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

15996988 is a wasteful number, since it uses less digits than its factorization.

15996988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571332 (or 571330 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 55.

The square root of 15996988 is about 3999.6234822793. The cubic root of 15996988 is about 251.9683969775.

The spelling of 15996988 in words is "fifteen million, nine hundred ninety-six thousand, nine hundred eighty-eight".