28290608 has 20 divisors (see below), whose sum is σ = 55431720. Its totient is φ = 13985664.

The previous prime is 28290599. The next prime is 28290643. The reversal of 28290608 is 80609282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8510 + ... + 11357.

It is an arithmetic number, because the mean of its divisors is an integer number (2771586).

Almost surely, 2^28290608 is an apocalyptic number.

It is an amenable number.

28290608 is a deficient number, since it is larger than the sum of its proper divisors (27141112).

28290608 is a wasteful number, since it uses less digits than its factorization.

28290608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19964 (or 19958 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28290608 is about 5318.8916138609. The cubic root of 28290608 is about 304.7058276225.

The spelling of 28290608 in words is "twenty-eight million, two hundred ninety thousand, six hundred eight".