397438 has 4 divisors (see below), whose sum is σ = 596160. Its totient is φ = 198718.

The previous prime is 397433. The next prime is 397459. The reversal of 397438 is 834793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 834793 = 79 ⋅10567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99358 + ... + 99361.

It is an arithmetic number, because the mean of its divisors is an integer number (149040).

2³⁹⁷⁴³⁸ is an apocalyptic number.

397438 is a deficient number, since it is larger than the sum of its proper divisors (198722).

397438 is a wasteful number, since it uses less digits than its factorization.

397438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198721.

The product of its digits is 18144, while the sum is 34.

The square root of 397438 is about 630.4268395302. The cubic root of 397438 is about 73.5229847747.

The spelling of 397438 in words is "three hundred ninety-seven thousand, four hundred thirty-eight".