28861932544 has 33 divisors (see below), whose sum is σ = 57706549177. Its totient is φ = 14428248064.

The previous prime is 28861932469. The next prime is 28861932551. The reversal of 28861932544 is 44523916882.

It is a happy number.

The square root of 28861932544 is 169888.

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

It can be written as a sum of positive squares in only one way, i.e., 97772544 + 28764160000 = 9888^2 + 169600^2 .

It is a super-2 number, since 2×28861932544² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28861932491 and 28861932500.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5433762 + ... + 5439070.

Almost surely, 2^28861932544 is an apocalyptic number.

28861932544 is the 169888-th square number.

It is an amenable number.

28861932544 is a deficient number, since it is larger than the sum of its proper divisors (28844616633).

28861932544 is an frugal number, since it uses more digits than its factorization.

28861932544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10638 (or 5311 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 28861932544 in words is "twenty-eight billion, eight hundred sixty-one million, nine hundred thirty-two thousand, five hundred forty-four".