921768 has 32 divisors (see below), whose sum is σ = 2328000. Its totient is φ = 304128.

The previous prime is 921761. The next prime is 921779. The reversal of 921768 is 867129.

It is not an unprimeable number, because it can be changed into a prime (921761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4533 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (72750).

2⁹²¹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

921768 is an abundant number, since it is smaller than the sum of its proper divisors (1406232).

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

921768 is a wasteful number, since it uses less digits than its factorization.

921768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 397 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 921768 is about 960.0874960127. The cubic root of 921768 is about 97.3211448218.

The spelling of 921768 in words is "nine hundred twenty-one thousand, seven hundred sixty-eight".