921089190 has 64 divisors (see below), whose sum is σ = 2588060160. Its totient is φ = 205397760.

The previous prime is 921089171. The next prime is 921089207. The reversal of 921089190 is 91980129.

It is a happy number.

It is a super-2 number, since 2×921089190² = 1696810591869712200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44880 + ... + 62099.

It is an arithmetic number, because the mean of its divisors is an integer number (40438440).

Almost surely, 2^921089190 is an apocalyptic number.

921089190 is an abundant number, since it is smaller than the sum of its proper divisors (1666970970).

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

921089190 is a wasteful number, since it uses less digits than its factorization.

921089190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107037.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 921089190 is about 30349.4512306236. The cubic root of 921089190 is about 972.9724915265.

The spelling of 921089190 in words is "nine hundred twenty-one million, eighty-nine thousand, one hundred ninety".