28940505120 has 192 divisors, whose sum is σ = 106623216000. Its totient is φ = 7311264768.

The previous prime is 28940505073. The next prime is 28940505133. The reversal of 28940505120 is 2150504982.

28940505120 is a `hidden beast` number, since 2 + 8 + 94 + 0 + 50 + 512 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94215 + ... + 258374.

It is an arithmetic number, because the mean of its divisors is an integer number (555329250).

Almost surely, 2^28940505120 is an apocalyptic number.

28940505120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28940505120 is an abundant number, since it is smaller than the sum of its proper divisors (77682710880).

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

28940505120 is a wasteful number, since it uses less digits than its factorization.

28940505120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352632 (or 352618 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 28940505120 in words is "twenty-eight billion, nine hundred forty million, five hundred five thousand, one hundred twenty".