91920344 has 32 divisors (see below), whose sum is σ = 177292800. Its totient is φ = 44656800.

The previous prime is 91920329. The next prime is 91920421. The reversal of 91920344 is 44302919.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91920344.

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, 55967 + ... + 57585.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^91920344 is an apocalyptic number.

91920344 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

It is an amenable number.

91920344 is a deficient number, since it is larger than the sum of its proper divisors (85372456).

91920344 is a wasteful number, since it uses less digits than its factorization.

91920344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 91920344 is about 9587.5097913900. The cubic root of 91920344 is about 451.3054176459.

The spelling of 91920344 in words is "ninety-one million, nine hundred twenty thousand, three hundred forty-four".