91372008 has 256 divisors, whose sum is σ = 313528320. Its totient is φ = 21491712.

The previous prime is 91372003. The next prime is 91372009. The reversal of 91372008 is 80027319.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (91372003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 853891 + ... + 853997.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^91372008 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 91372008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156764160).

91372008 is an abundant number, since it is smaller than the sum of its proper divisors (222156312).

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

91372008 is a wasteful number, since it uses less digits than its factorization.

91372008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 91372008 is about 9558.8706445898. The cubic root of 91372008 is about 450.4062307019.

The spelling of 91372008 in words is "ninety-one million, three hundred seventy-two thousand, eight".