392138 has 8 divisors (see below), whose sum is σ = 608580. Its totient is φ = 189280.

The previous prime is 392131. The next prime is 392143. The reversal of 392138 is 831293.

It can be written as a sum of positive squares in 2 ways, for example, as 380689 + 11449 = 617^2 + 107^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×392138² = 307544422088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (392131) by changing a digit.

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, 3323 + ... + 3438.

2³⁹²¹³⁸ is an apocalyptic number.

392138 is a deficient number, since it is larger than the sum of its proper divisors (216442).

392138 is a wasteful number, since it uses less digits than its factorization.

392138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6792.

The product of its digits is 1296, while the sum is 26.

The square root of 392138 is about 626.2092302098. The cubic root of 392138 is about 73.1947013593.

The spelling of 392138 in words is "three hundred ninety-two thousand, one hundred thirty-eight".