91064040 has 32 divisors (see below), whose sum is σ = 273192480. Its totient is φ = 24283712.

The previous prime is 91064009. The next prime is 91064041. The reversal of 91064040 is 4046019.

It is a super-2 number, since 2×91064040² = 16585318762243200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 91064040.

It is not an unprimeable number, because it can be changed into a prime (91064041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379314 + ... + 379553.

It is an arithmetic number, because the mean of its divisors is an integer number (8537265).

Almost surely, 2^91064040 is an apocalyptic number.

It is an amenable number.

91064040 is an abundant number, since it is smaller than the sum of its proper divisors (182128440).

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

91064040 is a wasteful number, since it uses less digits than its factorization.

91064040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758881 (or 758877 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 91064040 is about 9542.7480318826. The cubic root of 91064040 is about 449.8996319365.

The spelling of 91064040 in words is "ninety-one million, sixty-four thousand, forty".