28562280 has 32 divisors (see below), whose sum is σ = 85687200. Its totient is φ = 7616576.

The previous prime is 28562273. The next prime is 28562293. The reversal of 28562280 is 8226582.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118890 + ... + 119129.

It is an arithmetic number, because the mean of its divisors is an integer number (2677725).

Almost surely, 2^28562280 is an apocalyptic number.

28562280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28562280 is an abundant number, since it is smaller than the sum of its proper divisors (57124920).

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

28562280 is a wasteful number, since it uses less digits than its factorization.

28562280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238033 (or 238029 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 28562280 is about 5344.3689992365. The cubic root of 28562280 is about 305.6780757266.

The spelling of 28562280 in words is "twenty-eight million, five hundred sixty-two thousand, two hundred eighty".