91640676 has 48 divisors (see below), whose sum is σ = 227586240. Its totient is φ = 28600320.

The previous prime is 91640669. The next prime is 91640677. The reversal of 91640676 is 67604619.

It is not an unprimeable number, because it can be changed into a prime (91640677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41980 + ... + 44108.

It is an arithmetic number, because the mean of its divisors is an integer number (4741380).

Almost surely, 2^91640676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91640676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113793120).

91640676 is an abundant number, since it is smaller than the sum of its proper divisors (135945564).

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

91640676 is a wasteful number, since it uses less digits than its factorization.

91640676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364 (or 2362 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 91640676 is about 9572.9136630391. The cubic root of 91640676 is about 450.8472531861.

The spelling of 91640676 in words is "ninety-one million, six hundred forty thousand, six hundred seventy-six".