80638940 has 12 divisors (see below), whose sum is σ = 169341816. Its totient is φ = 32255568.

The previous prime is 80638927. The next prime is 80638997. The reversal of 80638940 is 4983608.

It is a junction number, because it is equal to n+sod(n) for n = 80638894 and 80638903.

It is a congruent number.

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, 2015954 + ... + 2015993.

It is an arithmetic number, because the mean of its divisors is an integer number (14111818).

Almost surely, 2^80638940 is an apocalyptic number.

It is an amenable number.

80638940 is an abundant number, since it is smaller than the sum of its proper divisors (88702876).

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

80638940 is a wasteful number, since it uses less digits than its factorization.

80638940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031956 (or 4031954 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 80638940 is about 8979.9187078726. The cubic root of 80638940 is about 432.0310262924.

The spelling of 80638940 in words is "eighty million, six hundred thirty-eight thousand, nine hundred forty".