91530372 has 48 divisors (see below), whose sum is σ = 226331840. Its totient is φ = 28708992.

The previous prime is 91530371. The next prime is 91530377. The reversal of 91530372 is 27303519.

It is not an unprimeable number, because it can be changed into a prime (91530371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34518 + ... + 37074.

Almost surely, 2^91530372 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 91530372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113165920).

91530372 is an abundant number, since it is smaller than the sum of its proper divisors (134801468).

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

91530372 is a wasteful number, since it uses less digits than its factorization.

91530372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 91530372 is about 9567.1506730060. The cubic root of 91530372 is about 450.6662919810. Note that the first 3 decimals are identical.

The spelling of 91530372 in words is "ninety-one million, five hundred thirty thousand, three hundred seventy-two".