392138474 has 36 divisors (see below), whose sum is σ = 740955654. Its totient is φ = 155125152.

The previous prime is 392138443. The next prime is 392138479. The reversal of 392138474 is 474831293.

It can be written as a sum of positive squares in 3 ways, for example, as 177076249 + 215062225 = 13307^2 + 14665^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (392138479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4724 + ... + 28400.

Almost surely, 2^392138474 is an apocalyptic number.

392138474 is a deficient number, since it is larger than the sum of its proper divisors (348817180).

392138474 is a wasteful number, since it uses less digits than its factorization.

392138474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23719 (or 23699 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 392138474 is about 19802.4865610357. The cubic root of 392138474 is about 731.9473085088.

The spelling of 392138474 in words is "three hundred ninety-two million, one hundred thirty-eight thousand, four hundred seventy-four".