91939080 has 64 divisors (see below), whose sum is σ = 283285440. Its totient is φ = 23853312.

The previous prime is 91939079. The next prime is 91939091. The reversal of 91939080 is 8093919.

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, 5914 + ... + 14793.

It is an arithmetic number, because the mean of its divisors is an integer number (4426335).

Almost surely, 2^91939080 is an apocalyptic number.

It is an amenable number.

91939080 is an abundant number, since it is smaller than the sum of its proper divisors (191346360).

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

91939080 is a wasteful number, since it uses less digits than its factorization.

91939080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20758 (or 20754 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 91939080 is about 9588.4868462130. The cubic root of 91939080 is about 451.3360785547.

The spelling of 91939080 in words is "ninety-one million, nine hundred thirty-nine thousand, eighty".