91428894 has 24 divisors (see below), whose sum is σ = 198382392. Its totient is φ = 30432240.

The previous prime is 91428881. The next prime is 91428913. The reversal of 91428894 is 49882419.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10629 + ... + 17199.

It is an arithmetic number, because the mean of its divisors is an integer number (8265933).

Almost surely, 2^91428894 is an apocalyptic number.

91428894 is an abundant number, since it is smaller than the sum of its proper divisors (106953498).

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

91428894 is a wasteful number, since it uses less digits than its factorization.

91428894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352 (or 7349 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 91428894 is about 9561.8457423240. The cubic root of 91428894 is about 450.4996819826.

The spelling of 91428894 in words is "ninety-one million, four hundred twenty-eight thousand, eight hundred ninety-four".