28256408 has 16 divisors (see below), whose sum is σ = 53250000. Its totient is φ = 14056416.

The previous prime is 28256399. The next prime is 28256413. The reversal of 28256408 is 80465282.

It is a congruent number.

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, 7283 + ... + 10466.

It is an arithmetic number, because the mean of its divisors is an integer number (3328125).

Almost surely, 2^28256408 is an apocalyptic number.

It is an amenable number.

28256408 is a deficient number, since it is larger than the sum of its proper divisors (24993592).

28256408 is a wasteful number, since it uses less digits than its factorization.

28256408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17954 (or 17950 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28256408 is about 5315.6756861193. The cubic root of 28256408 is about 304.5829936729.

The spelling of 28256408 in words is "twenty-eight million, two hundred fifty-six thousand, four hundred eight".