397538 has 4 divisors (see below), whose sum is σ = 596310. Its totient is φ = 198768.

The previous prime is 397519. The next prime is 397541. The reversal of 397538 is 835793.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 388129 + 9409 = 623^2 + 97^2 .

It is a super-2 number, since 2×397538² = 316072922888, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 397498 and 397507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99383 + ... + 99386.

2³⁹⁷⁵³⁸ is an apocalyptic number.

397538 is a deficient number, since it is larger than the sum of its proper divisors (198772).

397538 is a wasteful number, since it uses less digits than its factorization.

397538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198771.

The product of its digits is 22680, while the sum is 35.

The square root of 397538 is about 630.5061458860. The cubic root of 397538 is about 73.5291506689.

The spelling of 397538 in words is "three hundred ninety-seven thousand, five hundred thirty-eight".