80659872 has 36 divisors (see below), whose sum is σ = 229377330. Its totient is φ = 26886528.

The previous prime is 80659867. The next prime is 80659879. The reversal of 80659872 is 27895608.

It can be written as a sum of positive squares in only one way, i.e., 59536656 + 21123216 = 7716^2 + 4596^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (80659879) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139747 + ... + 140322.

Almost surely, 2^80659872 is an apocalyptic number.

It is an amenable number.

80659872 is an abundant number, since it is smaller than the sum of its proper divisors (148717458).

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

80659872 is a wasteful number, since it uses less digits than its factorization.

80659872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280085 (or 280074 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 80659872 is about 8981.0841216414. The cubic root of 80659872 is about 432.0684048058.

The spelling of 80659872 in words is "eighty million, six hundred fifty-nine thousand, eight hundred seventy-two".