397798 has 4 divisors (see below), whose sum is σ = 596700. Its totient is φ = 198898.

The previous prime is 397763. The next prime is 397799. The reversal of 397798 is 897793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897793 = 13 ⋅69061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397799) by changing a digit.

397798 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 as a sum of consecutive naturals, namely, 99448 + ... + 99451.

It is an arithmetic number, because the mean of its divisors is an integer number (149175).

2³⁹⁷⁷⁹⁸ is an apocalyptic number.

397798 is a deficient number, since it is larger than the sum of its proper divisors (198902).

397798 is a wasteful number, since it uses less digits than its factorization.

397798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198901.

The product of its digits is 95256, while the sum is 43.

The square root of 397798 is about 630.7122957419. The cubic root of 397798 is about 73.5451771560.

The spelling of 397798 in words is "three hundred ninety-seven thousand, seven hundred ninety-eight".