80640924 has 48 divisors (see below), whose sum is σ = 231587328. Its totient is φ = 21267648.

The previous prime is 80640913. The next prime is 80640941. The reversal of 80640924 is 42904608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35832 + ... + 38015.

It is an arithmetic number, because the mean of its divisors is an integer number (4824736).

Almost surely, 2^80640924 is an apocalyptic number.

80640924 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

80640924 is an abundant number, since it is smaller than the sum of its proper divisors (150946404).

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

80640924 is a wasteful number, since it uses less digits than its factorization.

80640924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73874 (or 73872 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 80640924 is about 8980.0291758992. The cubic root of 80640924 is about 432.0345694215.

The spelling of 80640924 in words is "eighty million, six hundred forty thousand, nine hundred twenty-four".