28956457488 has 60 divisors (see below), whose sum is σ = 87017116560. Its totient is φ = 8273272896.

The previous prime is 28956457447. The next prime is 28956457489. The reversal of 28956457488 is 88475465982.

It is not an unprimeable number, because it can be changed into a prime (28956457489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6153358 + ... + 6158061.

It is an arithmetic number, because the mean of its divisors is an integer number (1450285276).

Almost surely, 2^28956457488 is an apocalyptic number.

28956457488 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28956457488 is an abundant number, since it is smaller than the sum of its proper divisors (58060659072).

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

28956457488 is a wasteful number, since it uses less digits than its factorization.

28956457488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311444 (or 12311431 counting only the distinct ones).

The product of its digits is 154828800, while the sum is 66.

The spelling of 28956457488 in words is "twenty-eight billion, nine hundred fifty-six million, four hundred fifty-seven thousand, four hundred eighty-eight".