91357488 has 60 divisors (see below), whose sum is σ = 260031720. Its totient is φ = 29933568.

The previous prime is 91357481. The next prime is 91357493. The reversal of 91357488 is 88475319.

It is a super-2 number, since 2×91357488² = 16692381227340288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91357481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3120 + ... + 13872.

It is an arithmetic number, because the mean of its divisors is an integer number (4333862).

Almost surely, 2^91357488 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 91357488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130015860).

91357488 is an abundant number, since it is smaller than the sum of its proper divisors (168674232).

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

91357488 is a wasteful number, since it uses less digits than its factorization.

91357488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10826 (or 10817 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 91357488 is about 9558.1111104653. Note that the first 5 decimals coincide. The cubic root of 91357488 is about 450.3823712980.

The spelling of 91357488 in words is "ninety-one million, three hundred fifty-seven thousand, four hundred eighty-eight".