28971459231 has 64 divisors (see below), whose sum is σ = 47311810560. Its totient is φ = 15528960000.

The previous prime is 28971459229. The next prime is 28971459247. The reversal of 28971459231 is 13295417982.

It is not a de Polignac number, because 28971459231 - 2¹ = 28971459229 is a prime.

It is a super-2 number, since 2×28971459231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28971459221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1332415 + ... + 1353983.

It is an arithmetic number, because the mean of its divisors is an integer number (739247040).

Almost surely, 2^28971459231 is an apocalyptic number.

28971459231 is a deficient number, since it is larger than the sum of its proper divisors (18340351329).

28971459231 is a wasteful number, since it uses less digits than its factorization.

28971459231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21728.

The product of its digits is 1088640, while the sum is 51.

The spelling of 28971459231 in words is "twenty-eight billion, nine hundred seventy-one million, four hundred fifty-nine thousand, two hundred thirty-one".