91598320 has 40 divisors (see below), whose sum is σ = 232328880. Its totient is φ = 33308160.

The previous prime is 91598303. The next prime is 91598321. The reversal of 91598320 is 2389519.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 91598320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91598321) 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, 51165 + ... + 52924.

It is an arithmetic number, because the mean of its divisors is an integer number (5808222).

Almost surely, 2^91598320 is an apocalyptic number.

It is an amenable number.

91598320 is an abundant number, since it is smaller than the sum of its proper divisors (140730560).

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

91598320 is a wasteful number, since it uses less digits than its factorization.

91598320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104113 (or 104107 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 91598320 is about 9570.7011237422. The cubic root of 91598320 is about 450.7777824740. Note that the first 4 decimals are identical.

It can be divided in two parts, 915 and 98320, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 91598320 in words is "ninety-one million, five hundred ninety-eight thousand, three hundred twenty".