28520504 has 16 divisors (see below), whose sum is σ = 53968200. Its totient is φ = 14128992.

The previous prime is 28520491. The next prime is 28520521. The reversal of 28520504 is 40502582.

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, 15482 + ... + 17225.

Almost surely, 2^28520504 is an apocalyptic number.

It is an amenable number.

28520504 is a deficient number, since it is larger than the sum of its proper divisors (25447696).

28520504 is a wasteful number, since it uses less digits than its factorization.

28520504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32822 (or 32818 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 28520504 is about 5340.4591562898. The cubic root of 28520504 is about 305.5289718703.

The spelling of 28520504 in words is "twenty-eight million, five hundred twenty thousand, five hundred four".