28530860 has 12 divisors (see below), whose sum is σ = 59914848. Its totient is φ = 11412336.

The previous prime is 28530857. The next prime is 28530871. The reversal of 28530860 is 6803582.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713252 + ... + 713291.

It is an arithmetic number, because the mean of its divisors is an integer number (4992904).

Almost surely, 2^28530860 is an apocalyptic number.

28530860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28530860 is an abundant number, since it is smaller than the sum of its proper divisors (31383988).

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

28530860 is a wasteful number, since it uses less digits than its factorization.

28530860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426552 (or 1426550 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 28530860 is about 5341.4286478432. The cubic root of 28530860 is about 305.5659473172.

The spelling of 28530860 in words is "twenty-eight million, five hundred thirty thousand, eight hundred sixty".