28666008 has 64 divisors (see below), whose sum is σ = 91008000. Its totient is φ = 8189856.

The previous prime is 28665983. The next prime is 28666021. The reversal of 28666008 is 80066682.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7968 + ... + 10991.

It is an arithmetic number, because the mean of its divisors is an integer number (1422000).

Almost surely, 2^28666008 is an apocalyptic number.

28666008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28666008 is an abundant number, since it is smaller than the sum of its proper divisors (62341992).

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

28666008 is a wasteful number, since it uses less digits than its factorization.

28666008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18981 (or 18971 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28666008 is about 5354.0646241897. The cubic root of 28666008 is about 306.0476665460.

The spelling of 28666008 in words is "twenty-eight million, six hundred sixty-six thousand, eight".