28791590 has 16 divisors (see below), whose sum is σ = 52329888. Its totient is φ = 11404416.

The previous prime is 28791527. The next prime is 28791601. The reversal of 28791590 is 9519782.

It is a congruent 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, 12947 + ... + 15006.

It is an arithmetic number, because the mean of its divisors is an integer number (3270618).

Almost surely, 2^28791590 is an apocalyptic number.

28791590 is a deficient number, since it is larger than the sum of its proper divisors (23538298).

28791590 is a wasteful number, since it uses less digits than its factorization.

28791590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28063.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 28791590 is about 5365.7795333018. The cubic root of 28791590 is about 306.4939336531.

The spelling of 28791590 in words is "twenty-eight million, seven hundred ninety-one thousand, five hundred ninety".