921968 has 20 divisors (see below), whose sum is σ = 1848840. Its totient is φ = 444864.

The previous prime is 921959. The next prime is 921989. The reversal of 921968 is 869129.

It is a congruent number.

It is an unprimeable number.

921968 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (92442).

2⁹²¹⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

921968 is an abundant number, since it is smaller than the sum of its proper divisors (926872).

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

921968 is a wasteful number, since it uses less digits than its factorization.

921968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2018 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 921968 is about 960.1916475371. The cubic root of 921968 is about 97.3281830431.

The spelling of 921968 in words is "nine hundred twenty-one thousand, nine hundred sixty-eight".