28443408 has 40 divisors (see below), whose sum is σ = 83976768. Its totient is φ = 8126592.

The previous prime is 28443379. The next prime is 28443439. The reversal of 28443408 is 80434482.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41991 + ... + 42662.

Almost surely, 2^28443408 is an apocalyptic number.

28443408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28443408 is an abundant number, since it is smaller than the sum of its proper divisors (55533360).

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

28443408 is a wasteful number, since it uses less digits than its factorization.

28443408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84671 (or 84665 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 28443408 is about 5333.2361657815. The cubic root of 28443408 is about 305.2534237003.

The spelling of 28443408 in words is "twenty-eight million, four hundred forty-three thousand, four hundred eight".