921922938 has 32 divisors (see below), whose sum is σ = 2137795200. Its totient is φ = 293946048.

The previous prime is 921922931. The next prime is 921922943. The reversal of 921922938 is 839229129.

It is a happy number.

It is a super-2 number, since 2×921922938² = 1699883807221103688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 921922893 and 921922902.

It is not an unprimeable number, because it can be changed into a prime (921922931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369903 + ... + 372386.

It is an arithmetic number, because the mean of its divisors is an integer number (66806100).

Almost surely, 2^921922938 is an apocalyptic number.

921922938 is an abundant number, since it is smaller than the sum of its proper divisors (1215872262).

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

921922938 is a wasteful number, since it uses less digits than its factorization.

921922938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742323 (or 742317 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 921922938 is about 30363.1839239563. The cubic root of 921922938 is about 973.2659735030.

The spelling of 921922938 in words is "nine hundred twenty-one million, nine hundred twenty-two thousand, nine hundred thirty-eight".