921024138 has 32 divisors (see below), whose sum is σ = 1894464000. Its totient is φ = 298344816.

The previous prime is 921024077. The next prime is 921024179. The reversal of 921024138 is 831420129.

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 15 ways as a sum of consecutive naturals, for example, 42373 + ... + 60311.

It is an arithmetic number, because the mean of its divisors is an integer number (59202000).

Almost surely, 2^921024138 is an apocalyptic number.

921024138 is an abundant number, since it is smaller than the sum of its proper divisors (973439862).

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

921024138 is a wasteful number, since it uses less digits than its factorization.

921024138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186.

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

The square root of 921024138 is about 30348.3794954525. The cubic root of 921024138 is about 972.9495855664.

The spelling of 921024138 in words is "nine hundred twenty-one million, twenty-four thousand, one hundred thirty-eight".