397956 has 24 divisors (see below), whose sum is σ = 1000384. Its totient is φ = 122400.

The previous prime is 397951. The next prime is 397963. The reversal of 397956 is 659793.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (397951) by changing a digit.

397956 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, 1120 + ... + 1431.

2³⁹⁷⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

397956 is an abundant number, since it is smaller than the sum of its proper divisors (602428).

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

397956 is a wasteful number, since it uses less digits than its factorization.

397956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571 (or 2569 counting only the distinct ones).

The product of its digits is 51030, while the sum is 39.

The square root of 397956 is about 630.8375385153. The cubic root of 397956 is about 73.5549129179.

The spelling of 397956 in words is "three hundred ninety-seven thousand, nine hundred fifty-six".