80609940 has 72 divisors (see below), whose sum is σ = 255161088. Its totient is φ = 20560320.

The previous prime is 80609929. The next prime is 80609981. The reversal of 80609940 is 4990608.

80609940 is a `hidden beast` number, since 8 + 0 + 609 + 9 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80609895 and 80609904.

It is a congruent number.

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, 5596 + ... + 13875.

It is an arithmetic number, because the mean of its divisors is an integer number (3543904).

Almost surely, 2^80609940 is an apocalyptic number.

It is an amenable number.

80609940 is an abundant number, since it is smaller than the sum of its proper divisors (174551148).

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

80609940 is a wasteful number, since it uses less digits than its factorization.

80609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19509 (or 19504 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 80609940 is about 8978.3038487233. The cubic root of 80609940 is about 431.9792299685.

The spelling of 80609940 in words is "eighty million, six hundred nine thousand, nine hundred forty".