923388138 has 12 divisors (see below), whose sum is σ = 2000674338. Its totient is φ = 307796040.

The previous prime is 923388127. The next prime is 923388139. The reversal of 923388138 is 831883329.

923388138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 676364049 + 247024089 = 26007^2 + 15717^2 .

It is a junction number, because it is equal to n+sod(n) for n = 923388093 and 923388102.

It is not an unprimeable number, because it can be changed into a prime (923388139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25649653 + ... + 25649688.

Almost surely, 2^923388138 is an apocalyptic number.

923388138 is an abundant number, since it is smaller than the sum of its proper divisors (1077286200).

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

923388138 is a wasteful number, since it uses less digits than its factorization.

923388138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51299349 (or 51299346 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 923388138 is about 30387.3022494594. The cubic root of 923388138 is about 973.7813002024.

The spelling of 923388138 in words is "nine hundred twenty-three million, three hundred eighty-eight thousand, one hundred thirty-eight".