28920631460 has 24 divisors (see below), whose sum is σ = 69409515840. Its totient is φ = 9915645024.

The previous prime is 28920631459. The next prime is 28920631513. The reversal of 28920631460 is 6413602982.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103287830 + ... + 103288109.

It is an arithmetic number, because the mean of its divisors is an integer number (2892063160).

Almost surely, 2^28920631460 is an apocalyptic number.

28920631460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28920631460 is an abundant number, since it is smaller than the sum of its proper divisors (40488884380).

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

28920631460 is a wasteful number, since it uses less digits than its factorization.

28920631460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206575955 (or 206575953 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The spelling of 28920631460 in words is "twenty-eight billion, nine hundred twenty million, six hundred thirty-one thousand, four hundred sixty".