28555408 has 20 divisors (see below), whose sum is σ = 63230080. Its totient is φ = 12237984.

The previous prime is 28555363. The next prime is 28555447. The reversal of 28555408 is 80455582.

It is a super-2 number, since 2×28555408² = 1630822652092928, 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, 127368 + ... + 127591.

It is an arithmetic number, because the mean of its divisors is an integer number (3161504).

Almost surely, 2^28555408 is an apocalyptic number.

28555408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28555408 is an abundant number, since it is smaller than the sum of its proper divisors (34674672).

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

28555408 is a wasteful number, since it uses less digits than its factorization.

28555408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254974 (or 254968 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 37.

The square root of 28555408 is about 5343.7260408820. The cubic root of 28555408 is about 305.6535586803.

The spelling of 28555408 in words is "twenty-eight million, five hundred fifty-five thousand, four hundred eight".