397982 has 8 divisors (see below), whose sum is σ = 642936. Its totient is φ = 183672.

The previous prime is 397981. The next prime is 398011. The reversal of 397982 is 289793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7628 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (80367).

2³⁹⁷⁹⁸² is an apocalyptic number.

397982 is a deficient number, since it is larger than the sum of its proper divisors (244954).

397982 is a wasteful number, since it uses less digits than its factorization.

397982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15322.

The product of its digits is 27216, while the sum is 38.

The square root of 397982 is about 630.8581457031. The cubic root of 397982 is about 73.5565147584.

The spelling of 397982 in words is "three hundred ninety-seven thousand, nine hundred eighty-two".