28404008 has 32 divisors (see below), whose sum is σ = 57182760. Its totient is φ = 13178880.

The previous prime is 28403989. The next prime is 28404017. The reversal of 28404008 is 80040482.

It can be written as a sum of positive squares in 4 ways, for example, as 27478564 + 925444 = 5242^2 + 962^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8498 + ... + 11358.

Almost surely, 2^28404008 is an apocalyptic number.

It is an amenable number.

28404008 is an abundant number, since it is smaller than the sum of its proper divisors (28778752).

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

28404008 is a wasteful number, since it uses less digits than its factorization.

28404008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 28404008 is about 5329.5410684223. The cubic root of 28404008 is about 305.1124122052.

The spelling of 28404008 in words is "twenty-eight million, four hundred four thousand, eight".