921163320 has 768 divisors, whose sum is σ = 4136832000. Its totient is φ = 177914880.

The previous prime is 921163303. The next prime is 921163349. The reversal of 921163320 is 23361129.

921163320 is a `hidden beast` number, since 9 + 2 + 1 + 1 + 633 + 20 = 666.

It is a super-2 number, since 2×921163320² = 1697083724226844800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17380414 + ... + 17380466.

It is an arithmetic number, because the mean of its divisors is an integer number (5386500).

Almost surely, 2^921163320 is an apocalyptic number.

921163320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921163320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068416000).

921163320 is an abundant number, since it is smaller than the sum of its proper divisors (3215668680).

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

921163320 is a wasteful number, since it uses less digits than its factorization.

921163320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 921163320 is about 30350.6724801939. The cubic root of 921163320 is about 972.9985926963.

The spelling of 921163320 in words is "nine hundred twenty-one million, one hundred sixty-three thousand, three hundred twenty".