91864940 has 24 divisors (see below), whose sum is σ = 204265152. Its totient is φ = 34584320.

The previous prime is 91864937. The next prime is 91865009. The reversal of 91864940 is 4946819.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134756 + ... + 135435.

It is an arithmetic number, because the mean of its divisors is an integer number (8511048).

Almost surely, 2^91864940 is an apocalyptic number.

It is an amenable number.

91864940 is an abundant number, since it is smaller than the sum of its proper divisors (112400212).

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

91864940 is a wasteful number, since it uses less digits than its factorization.

91864940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270217 (or 270215 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 91864940 is about 9584.6199716003. The cubic root of 91864940 is about 451.2147262580.

The spelling of 91864940 in words is "ninety-one million, eight hundred sixty-four thousand, nine hundred forty".