28159744680 has 96 divisors (see below), whose sum is σ = 91550557800. Its totient is φ = 7506690048.

The previous prime is 28159744663. The next prime is 28159744693. The reversal of 28159744680 is 8644795182.

It is a happy number.

28159744680 is a `hidden beast` number, since 2 + 8 + 1 + 597 + 4 + 46 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 24600667716 + 3559076964 = 156846^2 + 59658^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1186692 + ... + 1210188.

Almost surely, 2^28159744680 is an apocalyptic number.

28159744680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28159744680 is an abundant number, since it is smaller than the sum of its proper divisors (63390813120).

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

28159744680 is a wasteful number, since it uses less digits than its factorization.

28159744680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26843 (or 26836 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 28159744680 in words is "twenty-eight billion, one hundred fifty-nine million, seven hundred forty-four thousand, six hundred eighty".