91444422 has 32 divisors (see below), whose sum is σ = 188762112. Its totient is φ = 29516544.

The previous prime is 91444417. The next prime is 91444439. The reversal of 91444422 is 22444419.

It is a self number, because there is not a number n which added to its sum of digits gives 91444422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25683 + ... + 29025.

It is an arithmetic number, because the mean of its divisors is an integer number (5898816).

Almost surely, 2^91444422 is an apocalyptic number.

91444422 is an abundant number, since it is smaller than the sum of its proper divisors (97317690).

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

91444422 is a wasteful number, since it uses less digits than its factorization.

91444422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492.

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

The square root of 91444422 is about 9562.6576849744. The cubic root of 91444422 is about 450.5251843622.

The spelling of 91444422 in words is "ninety-one million, four hundred forty-four thousand, four hundred twenty-two".