91759040 has 56 divisors (see below), whose sum is σ = 223186752. Its totient is φ = 35916800.

The previous prime is 91759021. The next prime is 91759049. The reversal of 91759040 is 4095719.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91759049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11990 + ... + 18090.

Almost surely, 2^91759040 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 91759040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111593376).

91759040 is an abundant number, since it is smaller than the sum of its proper divisors (131427712).

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

91759040 is a wasteful number, since it uses less digits than its factorization.

91759040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165 (or 6155 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91759040 is about 9579.0939028699. The cubic root of 91759040 is about 451.0412759276.

The spelling of 91759040 in words is "ninety-one million, seven hundred fifty-nine thousand, forty".