921412380 has 96 divisors (see below), whose sum is σ = 3043676160. Its totient is φ = 203811840.

The previous prime is 921412379. The next prime is 921412397. The reversal of 921412380 is 83214129.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22365 + ... + 48404.

It is an arithmetic number, because the mean of its divisors is an integer number (31704960).

Almost surely, 2^921412380 is an apocalyptic number.

It is an amenable number.

921412380 is an abundant number, since it is smaller than the sum of its proper divisors (2122263780).

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

921412380 is a wasteful number, since it uses less digits than its factorization.

921412380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70819 (or 70817 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 921412380 is about 30354.7752421262. The cubic root of 921412380 is about 973.0862764569.

The spelling of 921412380 in words is "nine hundred twenty-one million, four hundred twelve thousand, three hundred eighty".