28523013990 has 64 divisors (see below), whose sum is σ = 71195535360. Its totient is φ = 7306865280.

The previous prime is 28523013931. The next prime is 28523014019. The reversal of 28523013990 is 9931032582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74946 + ... + 250325.

It is an arithmetic number, because the mean of its divisors is an integer number (1112430240).

Almost surely, 2^28523013990 is an apocalyptic number.

28523013990 is an abundant number, since it is smaller than the sum of its proper divisors (42672521370).

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

28523013990 is a wasteful number, since it uses less digits than its factorization.

28523013990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325397.

The product of its (nonzero) digits is 116640, while the sum is 42.

The spelling of 28523013990 in words is "twenty-eight billion, five hundred twenty-three million, thirteen thousand, nine hundred ninety".