91920022 has 8 divisors (see below), whose sum is σ = 142327872. Its totient is φ = 44477400.

The previous prime is 91920019. The next prime is 91920083. The reversal of 91920022 is 22002919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741229 + ... + 741352.

It is an arithmetic number, because the mean of its divisors is an integer number (17790984).

Almost surely, 2^91920022 is an apocalyptic number.

91920022 is a deficient number, since it is larger than the sum of its proper divisors (50407850).

91920022 is a wasteful number, since it uses less digits than its factorization.

91920022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482614.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 91920022 is about 9587.4929986937. The cubic root of 91920022 is about 451.3048906660.

The spelling of 91920022 in words is "ninety-one million, nine hundred twenty thousand, twenty-two".