397898 has 16 divisors (see below), whose sum is σ = 647520. Its totient is φ = 182736.

The previous prime is 397897. The next prime is 397907. The reversal of 397898 is 898793.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265 + ... + 1547.

It is an arithmetic number, because the mean of its divisors is an integer number (40470).

2³⁹⁷⁸⁹⁸ is an apocalyptic number.

397898 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

397898 is a deficient number, since it is larger than the sum of its proper divisors (249622).

397898 is a wasteful number, since it uses less digits than its factorization.

397898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its digits is 108864, while the sum is 44.

The square root of 397898 is about 630.7915662087. The cubic root of 397898 is about 73.5513393300.

The spelling of 397898 in words is "three hundred ninety-seven thousand, eight hundred ninety-eight".