28131763532 has 24 divisors (see below), whose sum is σ = 49604950080. Its totient is φ = 13959003600.

The previous prime is 28131763529. The next prime is 28131763547. The reversal of 28131763532 is 23536713182.

It is a super-2 number, since 2×28131763532² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28131763532.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1576283 + ... + 1594029.

It is an arithmetic number, because the mean of its divisors is an integer number (2066872920).

Almost surely, 2^28131763532 is an apocalyptic number.

It is an amenable number.

28131763532 is a deficient number, since it is larger than the sum of its proper divisors (21473186548).

28131763532 is a wasteful number, since it uses less digits than its factorization.

28131763532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20741 (or 20739 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The spelling of 28131763532 in words is "twenty-eight billion, one hundred thirty-one million, seven hundred sixty-three thousand, five hundred thirty-two".