15933972 has 12 divisors (see below), whose sum is σ = 37179296. Its totient is φ = 5311320.

The previous prime is 15933959. The next prime is 15933977. The reversal of 15933972 is 27933951.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 15933972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15933977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663904 + ... + 663927.

Almost surely, 2^15933972 is an apocalyptic number.

15933972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15933972 is an abundant number, since it is smaller than the sum of its proper divisors (21245324).

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

15933972 is a wasteful number, since it uses less digits than its factorization.

15933972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327838 (or 1327836 counting only the distinct ones).

The product of its digits is 51030, while the sum is 39.

The square root of 15933972 is about 3991.7379673521. The cubic root of 15933972 is about 251.6371067913.

It can be divided in two parts, 1593 and 3972, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 15933972 in words is "fifteen million, nine hundred thirty-three thousand, nine hundred seventy-two".