28558544520 has 64 divisors (see below), whose sum is σ = 93464331840. Its totient is φ = 6923283200.

The previous prime is 28558544503. The next prime is 28558544533. The reversal of 28558544520 is 2544585582.

It is a self number, because there is not a number n which added to its sum of digits gives 28558544520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10816311 + ... + 10818950.

It is an arithmetic number, because the mean of its divisors is an integer number (1460380185).

Almost surely, 2^28558544520 is an apocalyptic number.

28558544520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28558544520 is an abundant number, since it is smaller than the sum of its proper divisors (64905787320).

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

28558544520 is a wasteful number, since it uses less digits than its factorization.

28558544520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21635286 (or 21635282 counting only the distinct ones).

The product of its (nonzero) digits is 2560000, while the sum is 48.

The spelling of 28558544520 in words is "twenty-eight billion, five hundred fifty-eight million, five hundred forty-four thousand, five hundred twenty".