15528428 has 6 divisors (see below), whose sum is σ = 27174756. Its totient is φ = 7764212.

The previous prime is 15528413. The next prime is 15528433. The reversal of 15528428 is 82482551.

It is a happy number.

It is a super-2 number, since 2×15528428² = 482264152302368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1941050 + ... + 1941057.

It is an arithmetic number, because the mean of its divisors is an integer number (4529126).

Almost surely, 2^15528428 is an apocalyptic number.

It is an amenable number.

15528428 is a deficient number, since it is larger than the sum of its proper divisors (11646328).

15528428 is a wasteful number, since it uses less digits than its factorization.

15528428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882111 (or 3882109 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The square root of 15528428 is about 3940.6126427245. The cubic root of 15528428 is about 249.4838845660.

The spelling of 15528428 in words is "fifteen million, five hundred twenty-eight thousand, four hundred twenty-eight".