921830240 has 24 divisors (see below), whose sum is σ = 2177824320. Its totient is φ = 368732032.

The previous prime is 921830237. The next prime is 921830251. The reversal of 921830240 is 42038129.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2880560 + ... + 2880879.

It is an arithmetic number, because the mean of its divisors is an integer number (90742680).

Almost surely, 2^921830240 is an apocalyptic number.

It is an amenable number.

921830240 is an abundant number, since it is smaller than the sum of its proper divisors (1255994080).

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

921830240 is a wasteful number, since it uses less digits than its factorization.

921830240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761454 (or 5761446 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 921830240 is about 30361.6573987653. The cubic root of 921830240 is about 973.2333522540.

Adding to 921830240 its reverse (42038129), we get a palindrome (963868369).

The spelling of 921830240 in words is "nine hundred twenty-one million, eight hundred thirty thousand, two hundred forty".