80656020 has 96 divisors (see below), whose sum is σ = 257120640. Its totient is φ = 20977920.

The previous prime is 80656019. The next prime is 80656039. The reversal of 80656020 is 2065608.

80656020 is a `hidden beast` number, since 8 + 0 + 656 + 0 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20319 + ... + 23961.

It is an arithmetic number, because the mean of its divisors is an integer number (2678340).

Almost surely, 2^80656020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80656020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128560320).

80656020 is an abundant number, since it is smaller than the sum of its proper divisors (176464620).

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

80656020 is a wasteful number, since it uses less digits than its factorization.

80656020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702 (or 3694 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 80656020 is about 8980.8696683562. The cubic root of 80656020 is about 432.0615267306.

It can be divided in two parts, 80 and 656020, that added together give a square (656100 = 810²).

The spelling of 80656020 in words is "eighty million, six hundred fifty-six thousand, twenty".