921422824 has 32 divisors (see below), whose sum is σ = 2007950400. Its totient is φ = 388200960.

The previous prime is 921422819. The next prime is 921422837. The reversal of 921422824 is 428224129.

It is a self number, because there is not a number n which added to its sum of digits gives 921422824.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136137 + ... + 142744.

It is an arithmetic number, because the mean of its divisors is an integer number (62748450).

Almost surely, 2^921422824 is an apocalyptic number.

It is an amenable number.

921422824 is an abundant number, since it is smaller than the sum of its proper divisors (1086527576).

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

921422824 is a wasteful number, since it uses less digits than its factorization.

921422824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278953 (or 278949 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 921422824 is about 30354.9472738794. The cubic root of 921422824 is about 973.0899530137.

The spelling of 921422824 in words is "nine hundred twenty-one million, four hundred twenty-two thousand, eight hundred twenty-four".