28317880372 has 24 divisors (see below), whose sum is σ = 51557703680. Its totient is φ = 13594301280.

The previous prime is 28317880363. The next prime is 28317880391. The reversal of 28317880372 is 27308871382.

It is a congruent number.

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, 883347 + ... + 914842.

Almost surely, 2^28317880372 is an apocalyptic number.

It is an amenable number.

28317880372 is a deficient number, since it is larger than the sum of its proper divisors (23239823308).

28317880372 is a wasteful number, since it uses less digits than its factorization.

28317880372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798351 (or 1798349 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 49.

The spelling of 28317880372 in words is "twenty-eight billion, three hundred seventeen million, eight hundred eighty thousand, three hundred seventy-two".