91424442 has 16 divisors (see below), whose sum is σ = 183808512. Its totient is φ = 30314880.

The previous prime is 91424441. The next prime is 91424461. The reversal of 91424442 is 24442419.

It is a super-2 number, since 2×91424442² = 16716857190022728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91424441) 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, 38743 + ... + 41034.

It is an arithmetic number, because the mean of its divisors is an integer number (11488032).

Almost surely, 2^91424442 is an apocalyptic number.

91424442 is an abundant number, since it is smaller than the sum of its proper divisors (92384070).

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

91424442 is a wasteful number, since it uses less digits than its factorization.

91424442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79973.

The product of its digits is 9216, while the sum is 30.

The square root of 91424442 is about 9561.6129392483. The cubic root of 91424442 is about 450.4923697167.

The spelling of 91424442 in words is "ninety-one million, four hundred twenty-four thousand, four hundred forty-two".