15999472 has 20 divisors (see below), whose sum is σ = 31999936. Its totient is φ = 7741440.

The previous prime is 15999461. The next prime is 15999491. The reversal of 15999472 is 27499951.

It is a happy number.

15999472 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, 15633 + ... + 16624.

Almost surely, 2^15999472 is an apocalyptic number.

It is an amenable number.

15999472 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.

15999472 is a wasteful number, since it uses less digits than its factorization.

15999472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32296 (or 32290 counting only the distinct ones).

The product of its digits is 204120, while the sum is 46.

The square root of 15999472 is about 3999.9339994555. The cubic root of 15999472 is about 251.9814381222.

It can be divided in two parts, 15999 and 472, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 15999472 in words is "fifteen million, nine hundred ninety-nine thousand, four hundred seventy-two".