91552398 has 16 divisors (see below), whose sum is σ = 209262720. Its totient is φ = 26157816.

The previous prime is 91552387. The next prime is 91552411. The reversal of 91552398 is 89325519.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 2179819 = 91552398 / (9 + 1 + 5 + 5 + 2 + 3 + 9 + 8).

It is a congruent number.

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, 1089868 + ... + 1089951.

It is an arithmetic number, because the mean of its divisors is an integer number (13078920).

Almost surely, 2^91552398 is an apocalyptic number.

91552398 is an abundant number, since it is smaller than the sum of its proper divisors (117710322).

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

91552398 is a wasteful number, since it uses less digits than its factorization.

91552398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179831.

The product of its digits is 97200, while the sum is 42.

The square root of 91552398 is about 9568.3017301922. The cubic root of 91552398 is about 450.7024387426.

The spelling of 91552398 in words is "ninety-one million, five hundred fifty-two thousand, three hundred ninety-eight".