28555790 has 16 divisors (see below), whose sum is σ = 52494912. Its totient is φ = 11179104.

The previous prime is 28555783. The next prime is 28555799. The reversal of 28555790 is 9755582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555799) 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, 29909 + ... + 30848.

It is an arithmetic number, because the mean of its divisors is an integer number (3280932).

Almost surely, 2^28555790 is an apocalyptic number.

28555790 is a deficient number, since it is larger than the sum of its proper divisors (23939122).

28555790 is a wasteful number, since it uses less digits than its factorization.

28555790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60811.

The product of its (nonzero) digits is 126000, while the sum is 41.

The square root of 28555790 is about 5343.7617836127. The cubic root of 28555790 is about 305.6549216345.

The spelling of 28555790 in words is "twenty-eight million, five hundred fifty-five thousand, seven hundred ninety".