28808987120 has 40 divisors (see below), whose sum is σ = 70506209040. Its totient is φ = 10917089280.

The previous prime is 28808987113. The next prime is 28808987183. The reversal of 28808987120 is 2178980882.

It is a tau number, because it is divible by the number of its divisors (40).

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, 9475121 + ... + 9478160.

It is an arithmetic number, because the mean of its divisors is an integer number (1762655226).

Almost surely, 2^28808987120 is an apocalyptic number.

28808987120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28808987120 is an abundant number, since it is smaller than the sum of its proper divisors (41697221920).

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

28808987120 is a wasteful number, since it uses less digits than its factorization.

28808987120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18953313 (or 18953307 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The spelling of 28808987120 in words is "twenty-eight billion, eight hundred eight million, nine hundred eighty-seven thousand, one hundred twenty".