921331968 has 72 divisors (see below), whose sum is σ = 2518436928. Its totient is φ = 298801152.

The previous prime is 921331963. The next prime is 921331969. The reversal of 921331968 is 869133129.

It is not an unprimeable number, because it can be changed into a prime (921331963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12205 + ... + 44627.

Almost surely, 2^921331968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921331968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1259218464).

921331968 is an abundant number, since it is smaller than the sum of its proper divisors (1597104960).

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

921331968 is a wasteful number, since it uses less digits than its factorization.

921331968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32479 (or 32465 counting only the distinct ones).

The product of its digits is 69984, while the sum is 42.

The square root of 921331968 is about 30353.4506769823. The cubic root of 921331968 is about 973.0579684334.

The spelling of 921331968 in words is "nine hundred twenty-one million, three hundred thirty-one thousand, nine hundred sixty-eight".