15915332028 has 12 divisors (see below), whose sum is σ = 37135774760. Its totient is φ = 5305110672.

The previous prime is 15915332009. The next prime is 15915332039. The reversal of 15915332028 is 82023351951.

15915332028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×15915332028² (a number of 21 digits) 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663138823 + ... + 663138846.

Almost surely, 2^15915332028 is an apocalyptic number.

It is an amenable number.

15915332028 is an abundant number, since it is smaller than the sum of its proper divisors (21220442732).

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

15915332028 is a wasteful number, since it uses less digits than its factorization.

15915332028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326277676 (or 1326277674 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

Adding to 15915332028 its reverse (82023351951), we get a palindrome (97938683979).

The spelling of 15915332028 in words is "fifteen billion, nine hundred fifteen million, three hundred thirty-two thousand, twenty-eight".