28767832731 has 24 divisors (see below), whose sum is σ = 45339793200. Its totient is φ = 17431718400.

The previous prime is 28767832729. The next prime is 28767832733. The reversal of 28767832731 is 13723876782.

It is a happy number.

28767832731 is a `hidden beast` number, since 287 + 6 + 7 + 8 + 327 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (28767832729) and next prime (28767832733).

It is not a de Polignac number, because 28767832731 - 2¹ = 28767832729 is a prime.

It is a super-2 number, since 2×28767832731² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28767832733) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 554211 + ... + 603891.

It is an arithmetic number, because the mean of its divisors is an integer number (1889158050).

Almost surely, 2^28767832731 is an apocalyptic number.

28767832731 is a deficient number, since it is larger than the sum of its proper divisors (16571960469).

28767832731 is a wasteful number, since it uses less digits than its factorization.

28767832731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55547 (or 55544 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The spelling of 28767832731 in words is "twenty-eight billion, seven hundred sixty-seven million, eight hundred thirty-two thousand, seven hundred thirty-one".