397738 has 16 divisors (see below), whose sum is σ = 660960. Its totient is φ = 178000.

The previous prime is 397729. The next prime is 397751. The reversal of 397738 is 837793.

397738 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 397697 and 397706.

It is an unprimeable number.

397738 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2133 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (41310).

2³⁹⁷⁷³⁸ is an apocalyptic number.

397738 is a deficient number, since it is larger than the sum of its proper divisors (263222).

397738 is a wasteful number, since it uses less digits than its factorization.

397738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 31752, while the sum is 37.

The square root of 397738 is about 630.6647286792. The cubic root of 397738 is about 73.5414793558.

It can be divided in two parts, 39 and 7738, that added together give a palindrome (7777).

The spelling of 397738 in words is "three hundred ninety-seven thousand, seven hundred thirty-eight".