397240 has 16 divisors (see below), whose sum is σ = 893880. Its totient is φ = 158880.

The previous prime is 397237. The next prime is 397253. The reversal of 397240 is 42793.

397240 = 150² + 151² + ... + 165².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4926 + ... + 5005.

2³⁹⁷²⁴⁰ is an apocalyptic number.

It is an amenable number.

397240 is an abundant number, since it is smaller than the sum of its proper divisors (496640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397240 is a wasteful number, since it uses less digits than its factorization.

397240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942 (or 9938 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 397240 is about 630.2697835054. The cubic root of 397240 is about 73.5107732523.

The spelling of 397240 in words is "three hundred ninety-seven thousand, two hundred forty".