28731175464 has 32 divisors (see below), whose sum is σ = 71853462720. Its totient is φ = 9573655296.

The previous prime is 28731175463. The next prime is 28731175477. The reversal of 28731175464 is 46457113782.

It is not an unprimeable number, because it can be changed into a prime (28731175463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143292 + ... + 279275.

It is an arithmetic number, because the mean of its divisors is an integer number (2245420710).

Almost surely, 2^28731175464 is an apocalyptic number.

28731175464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28731175464 is an abundant number, since it is smaller than the sum of its proper divisors (43122287256).

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

28731175464 is a wasteful number, since it uses less digits than its factorization.

28731175464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425409 (or 425405 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 48.

The spelling of 28731175464 in words is "twenty-eight billion, seven hundred thirty-one million, one hundred seventy-five thousand, four hundred sixty-four".