91527940 has 72 divisors (see below), whose sum is σ = 231964992. Its totient is φ = 29712960.

The previous prime is 91527929. The next prime is 91527977. The reversal of 91527940 is 4972519.

It is a self number, because there is not a number n which added to its sum of digits gives 91527940.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49635 + ... + 51445.

It is an arithmetic number, because the mean of its divisors is an integer number (3221736).

Almost surely, 2^91527940 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 91527940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115982496).

91527940 is an abundant number, since it is smaller than the sum of its proper divisors (140437052).

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

91527940 is a wasteful number, since it uses less digits than its factorization.

91527940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865 (or 1844 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 91527940 is about 9567.0235705783. The cubic root of 91527940 is about 450.6623004821.

The spelling of 91527940 in words is "ninety-one million, five hundred twenty-seven thousand, nine hundred forty".