921864384 has 84 divisors (see below), whose sum is σ = 3019850704. Its totient is φ = 263388672.

The previous prime is 921864373. The next prime is 921864407. The reversal of 921864384 is 483468129.

It is a happy number.

921864384 is a `hidden beast` number, since 92 + 186 + 4 + 384 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 110287 + ... + 118350.

Almost surely, 2^921864384 is an apocalyptic number.

It is an amenable number.

921864384 is an abundant number, since it is smaller than the sum of its proper divisors (2097986320).

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

921864384 is a wasteful number, since it uses less digits than its factorization.

921864384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228662 (or 228649 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 921864384 is about 30362.2196817031. The cubic root of 921864384 is about 973.2453680851.

The spelling of 921864384 in words is "nine hundred twenty-one million, eight hundred sixty-four thousand, three hundred eighty-four".