28520488 has 16 divisors (see below), whose sum is σ = 54921780. Its totient is φ = 13874688.

The previous prime is 28520477. The next prime is 28520491. The reversal of 28520488 is 88402582.

It can be written as a sum of positive squares in 2 ways, for example, as 28494244 + 26244 = 5338^2 + 162^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47881 + ... + 48472.

Almost surely, 2^28520488 is an apocalyptic number.

It is an amenable number.

28520488 is a deficient number, since it is larger than the sum of its proper divisors (26401292).

28520488 is a wasteful number, since it uses less digits than its factorization.

28520488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96396 (or 96392 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 37.

The square root of 28520488 is about 5340.4576582911. The cubic root of 28520488 is about 305.5289147364.

The spelling of 28520488 in words is "twenty-eight million, five hundred twenty thousand, four hundred eighty-eight".