28590224 has 20 divisors (see below), whose sum is σ = 59655036. Its totient is φ = 13195392.

The previous prime is 28590223. The next prime is 28590239. The reversal of 28590224 is 42209582.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 22733824 = 2420^2 + 4768^2 .

It is not an unprimeable number, because it can be changed into a prime (28590223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68519 + ... + 68934.

Almost surely, 2^28590224 is an apocalyptic number.

It is an amenable number.

28590224 is an abundant number, since it is smaller than the sum of its proper divisors (31064812).

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

28590224 is a wasteful number, since it uses less digits than its factorization.

28590224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137474 (or 137468 counting only the distinct ones).

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

The square root of 28590224 is about 5346.9827005518. The cubic root of 28590224 is about 305.7777302828. Note that the first 4 decimals are identical.

It can be divided in two parts, 285 and 90224, that added together give a palindrome (90509).

The spelling of 28590224 in words is "twenty-eight million, five hundred ninety thousand, two hundred twenty-four".