91890224 has 10 divisors (see below), whose sum is σ = 178037340. Its totient is φ = 45945104.

The previous prime is 91890191. The next prime is 91890229. The reversal of 91890224 is 42209819.

It is not an unprimeable number, because it can be changed into a prime (91890229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2871554 + ... + 2871585.

It is an arithmetic number, because the mean of its divisors is an integer number (17803734).

Almost surely, 2^91890224 is an apocalyptic number.

It is an amenable number.

91890224 is a deficient number, since it is larger than the sum of its proper divisors (86147116).

91890224 is a wasteful number, since it uses less digits than its factorization.

91890224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743147 (or 5743141 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 91890224 is about 9585.9388689893. The cubic root of 91890224 is about 451.2561184244.

The spelling of 91890224 in words is "ninety-one million, eight hundred ninety thousand, two hundred twenty-four".