15528972 has 12 divisors (see below), whose sum is σ = 36234296. Its totient is φ = 5176320.

The previous prime is 15528971. The next prime is 15528983. The reversal of 15528972 is 27982551.

15528972 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 2×15528972² = 482297942753568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15528972.

It is not an unprimeable number, because it can be changed into a prime (15528971) 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, 647029 + ... + 647052.

Almost surely, 2^15528972 is an apocalyptic number.

15528972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15528972 is an abundant number, since it is smaller than the sum of its proper divisors (20705324).

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

15528972 is a wasteful number, since it uses less digits than its factorization.

15528972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294088 (or 1294086 counting only the distinct ones).

The product of its digits is 50400, while the sum is 39.

The square root of 15528972 is about 3940.6816669201. The cubic root of 15528972 is about 249.4867978819.

The spelling of 15528972 in words is "fifteen million, five hundred twenty-eight thousand, nine hundred seventy-two".