921796840 has 32 divisors (see below), whose sum is σ = 2075220000. Its totient is φ = 368509504.

The previous prime is 921796817. The next prime is 921796859. The reversal of 921796840 is 48697129.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78471 + ... + 89449.

It is an arithmetic number, because the mean of its divisors is an integer number (64850625).

Almost surely, 2^921796840 is an apocalyptic number.

It is an amenable number.

921796840 is an abundant number, since it is smaller than the sum of its proper divisors (1153423160).

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

921796840 is a wasteful number, since it uses less digits than its factorization.

921796840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13089 (or 13085 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 921796840 is about 30361.1073579341. The cubic root of 921796840 is about 973.2215979616.

The spelling of 921796840 in words is "nine hundred twenty-one million, seven hundred ninety-six thousand, eight hundred forty".