28866404 has 24 divisors (see below), whose sum is σ = 58433088. Its totient is φ = 12221280.

The previous prime is 28866389. The next prime is 28866427. The reversal of 28866404 is 40466882.

It is a happy number.

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, 3887 + ... + 8534.

It is an arithmetic number, because the mean of its divisors is an integer number (2434712).

Almost surely, 2^28866404 is an apocalyptic number.

It is an amenable number.

28866404 is an abundant number, since it is smaller than the sum of its proper divisors (29566684).

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

28866404 is a wasteful number, since it uses less digits than its factorization.

28866404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12515 (or 12513 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 28866404 is about 5372.7464112872. The cubic root of 28866404 is about 306.7591755147.

The spelling of 28866404 in words is "twenty-eight million, eight hundred sixty-six thousand, four hundred four".