80656040 has 16 divisors (see below), whose sum is σ = 181476180. Its totient is φ = 32262400.

The previous prime is 80656039. The next prime is 80656063. The reversal of 80656040 is 4065608.

It can be written as a sum of positive squares in 2 ways, for example, as 72624484 + 8031556 = 8522^2 + 2834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80655994 and 80656012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008161 + ... + 1008240.

Almost surely, 2^80656040 is an apocalyptic number.

It is an amenable number.

80656040 is an abundant number, since it is smaller than the sum of its proper divisors (100820140).

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

80656040 is a wasteful number, since it uses less digits than its factorization.

80656040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016412 (or 2016408 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 80656040 is about 8980.8707818340. The cubic root of 80656040 is about 432.0615624429.

It can be divided in two parts, 806560 and 40, that multiplied together give a square (32262400 = 5680²).

The spelling of 80656040 in words is "eighty million, six hundred fifty-six thousand, forty".