28439552 has 22 divisors (see below), whose sum is σ = 56853378. Its totient is φ = 14219264.

The previous prime is 28439533. The next prime is 28439573. The reversal of 28439552 is 25593482.

It can be written as a sum of positive squares in only one way, i.e., 25563136 + 2876416 = 5056^2 + 1696^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12863 + ... + 14910.

Almost surely, 2^28439552 is an apocalyptic number.

It is an amenable number.

28439552 is a deficient number, since it is larger than the sum of its proper divisors (28413826).

28439552 is an equidigital number, since it uses as much as digits as its factorization.

28439552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27793 (or 27775 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 28439552 is about 5332.8746469423. The cubic root of 28439552 is about 305.2396289352.

The spelling of 28439552 in words is "twenty-eight million, four hundred thirty-nine thousand, five hundred fifty-two".