91540740 has 24 divisors (see below), whose sum is σ = 256314240. Its totient is φ = 24410848.

The previous prime is 91540739. The next prime is 91540751. The reversal of 91540740 is 4704519.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 91540698 and 91540707.

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, 762780 + ... + 762899.

It is an arithmetic number, because the mean of its divisors is an integer number (10679760).

Almost surely, 2^91540740 is an apocalyptic number.

It is an amenable number.

91540740 is an abundant number, since it is smaller than the sum of its proper divisors (164773500).

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

91540740 is a wasteful number, since it uses less digits than its factorization.

91540740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525691 (or 1525689 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 91540740 is about 9567.6925117815. The cubic root of 91540740 is about 450.6833075777.

The spelling of 91540740 in words is "ninety-one million, five hundred forty thousand, seven hundred forty".