397138 has 16 divisors (see below), whose sum is σ = 717120. Its totient is φ = 161136.

The previous prime is 397127. The next prime is 397151. The reversal of 397138 is 831793.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 1012.

It is an arithmetic number, because the mean of its divisors is an integer number (44820).

2³⁹⁷¹³⁸ is an apocalyptic number.

397138 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

397138 is a deficient number, since it is larger than the sum of its proper divisors (319982).

397138 is a wasteful number, since it uses less digits than its factorization.

397138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521.

The product of its digits is 4536, while the sum is 31.

The square root of 397138 is about 630.1888605807. The cubic root of 397138 is about 73.5044808844.

It can be divided in two parts, 397 and 138, that added together give a palindrome (535).

The spelling of 397138 in words is "three hundred ninety-seven thousand, one hundred thirty-eight".