28383939764964 has 135 divisors (see below), whose sum is σ = 86317752434067. Its totient is φ = 8109505280016.

The previous prime is 28383939764923. The next prime is 28383939764993. The reversal of 28383939764964 is 46946793938382.

The square root of 28383939764964 is 5327658.

It is a perfect power (a square), and thus also a powerful number.

28383939764964 is a `hidden beast` number, since 2 + 8 + 3 + 8 + 39 + 3 + 97 + 6 + 496 + 4 = 666.

It is a super-2 number, since 2×28383939764964² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 671263767 + ... + 671306049.

Almost surely, 2^{28383939764964} is an apocalyptic number.

28383939764964 is the 5327658-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28383939764964

28383939764964 is an abundant number, since it is smaller than the sum of its proper divisors (57933812669103).

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

28383939764964 is an frugal number, since it uses more digits than its factorization.

28383939764964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84596 (or 42295 counting only the distinct ones).

The product of its digits is 10158317568, while the sum is 81.

28383939764964 divided by its sum of digits (81) gives a square (350419009444 = 591962²).

The spelling of 28383939764964 in words is "twenty-eight trillion, three hundred eighty-three billion, nine hundred thirty-nine million, seven hundred sixty-four thousand, nine hundred sixty-four".