28713351944 has 16 divisors (see below), whose sum is σ = 54180451500. Its totient is φ = 14265231552.

The previous prime is 28713351857. The next prime is 28713351949. The reversal of 28713351944 is 44915331782.

It can be written as a sum of positive squares in 2 ways, for example, as 26264091844 + 2449260100 = 162062^2 + 49490^2 .

It is not an unprimeable number, because it can be changed into a prime (28713351949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11429219 + ... + 11431730.

Almost surely, 2^28713351944 is an apocalyptic number.

It is an amenable number.

28713351944 is a deficient number, since it is larger than the sum of its proper divisors (25467099556).

28713351944 is a wasteful number, since it uses less digits than its factorization.

28713351944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22861112 (or 22861108 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 28713351944 in words is "twenty-eight billion, seven hundred thirteen million, three hundred fifty-one thousand, nine hundred forty-four".