921138024 has 32 divisors (see below), whose sum is σ = 2304277920. Its totient is φ = 306854976.

The previous prime is 921137953. The next prime is 921138041. The reversal of 921138024 is 420831129.

It is a junction number, because it is equal to n+sod(n) for n = 921137982 and 921138000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30519 + ... + 52665.

It is an arithmetic number, because the mean of its divisors is an integer number (72008685).

Almost surely, 2^921138024 is an apocalyptic number.

It is an amenable number.

921138024 is an abundant number, since it is smaller than the sum of its proper divisors (1383139896).

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

921138024 is a wasteful number, since it uses less digits than its factorization.

921138024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23889 (or 23885 counting only the distinct ones).

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

The square root of 921138024 is about 30350.2557485106. The cubic root of 921138024 is about 972.9896861332.

The spelling of 921138024 in words is "nine hundred twenty-one million, one hundred thirty-eight thousand, twenty-four".