921384372 has 24 divisors (see below), whose sum is σ = 2168925696. Its totient is φ = 304409728.

The previous prime is 921384371. The next prime is 921384379. The reversal of 921384372 is 273483129.

It is a self number, because there is not a number n which added to its sum of digits gives 921384372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921384371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338388 + ... + 341099.

It is an arithmetic number, because the mean of its divisors is an integer number (90371904).

Almost surely, 2^921384372 is an apocalyptic number.

It is an amenable number.

921384372 is an abundant number, since it is smaller than the sum of its proper divisors (1247541324).

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

921384372 is a wasteful number, since it uses less digits than its factorization.

921384372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679607 (or 679605 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 921384372 is about 30354.3138944039. The cubic root of 921384372 is about 973.0764167831.

The spelling of 921384372 in words is "nine hundred twenty-one million, three hundred eighty-four thousand, three hundred seventy-two".