397418 has 8 divisors (see below), whose sum is σ = 681312. Its totient is φ = 170316.

The previous prime is 397379. The next prime is 397427. The reversal of 397418 is 814793.

397418 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14180 + ... + 14207.

It is an arithmetic number, because the mean of its divisors is an integer number (85164).

2³⁹⁷⁴¹⁸ is an apocalyptic number.

397418 is a deficient number, since it is larger than the sum of its proper divisors (283894).

397418 is a wasteful number, since it uses less digits than its factorization.

397418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28396.

The product of its digits is 6048, while the sum is 32.

The square root of 397418 is about 630.4109770618. The cubic root of 397418 is about 73.5217514718.

Subtracting from 397418 its sum of digits (32), we obtain a triangular number (397386 = T₈₉₁).

The spelling of 397418 in words is "three hundred ninety-seven thousand, four hundred eighteen".