397278 has 32 divisors (see below), whose sum is σ = 1009920. Its totient is φ = 113400.

The previous prime is 397259. The next prime is 397283. The reversal of 397278 is 872793.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

397278 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 15 ways as a sum of consecutive naturals, for example, 148 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (31560).

2³⁹⁷²⁷⁸ is an apocalyptic number.

397278 is an abundant number, since it is smaller than the sum of its proper divisors (612642).

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

397278 is a wasteful number, since it uses less digits than its factorization.

397278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 397278 is about 630.2999286054. The cubic root of 397278 is about 73.5131171924.

The spelling of 397278 in words is "three hundred ninety-seven thousand, two hundred seventy-eight".