28556872 has 16 divisors (see below), whose sum is σ = 56694060. Its totient is φ = 13438464.

The previous prime is 28556831. The next prime is 28556873. The reversal of 28556872 is 27865582.

It can be written as a sum of positive squares in 2 ways, for example, as 27102436 + 1454436 = 5206^2 + 1206^2 .

It is not an unprimeable number, because it can be changed into a prime (28556873) 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, 104853 + ... + 105124.

Almost surely, 2^28556872 is an apocalyptic number.

It is an amenable number.

28556872 is a deficient number, since it is larger than the sum of its proper divisors (28137188).

28556872 is a wasteful number, since it uses less digits than its factorization.

28556872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210000 (or 209996 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 28556872 is about 5343.8630221966. The cubic root of 28556872 is about 305.6587820827.

The spelling of 28556872 in words is "twenty-eight million, five hundred fifty-six thousand, eight hundred seventy-two".