28312804 has 12 divisors (see below), whose sum is σ = 53358844. Its totient is φ = 13067424.

The previous prime is 28312799. The next prime is 28312819. The reversal of 28312804 is 40821382.

It can be written as a sum of positive squares in 2 ways, for example, as 3810304 + 24502500 = 1952^2 + 4950^2 .

It is a super-2 number, since 2×28312804² = 1603229740684832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272187 + ... + 272290.

Almost surely, 2^28312804 is an apocalyptic number.

It is an amenable number.

28312804 is a deficient number, since it is larger than the sum of its proper divisors (25046040).

28312804 is a wasteful number, since it uses less digits than its factorization.

28312804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544494 (or 544492 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28312804 is about 5320.9777297034. The cubic root of 28312804 is about 304.7854946103.

The spelling of 28312804 in words is "twenty-eight million, three hundred twelve thousand, eight hundred four".