28490008 has 32 divisors (see below), whose sum is σ = 56597760. Its totient is φ = 13416480.

The previous prime is 28489969. The next prime is 28490009. The reversal of 28490008 is 80009482.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11173 + ... + 13483.

It is an arithmetic number, because the mean of its divisors is an integer number (1768680).

Almost surely, 2^28490008 is an apocalyptic number.

28490008 is the 3082-nd octagonal number.

It is an amenable number.

28490008 is a deficient number, since it is larger than the sum of its proper divisors (28107752).

28490008 is a wasteful number, since it uses less digits than its factorization.

28490008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 28490008 is about 5337.6032074331. The cubic root of 28490008 is about 305.4200358053.

The spelling of 28490008 in words is "twenty-eight million, four hundred ninety thousand, eight".