397478 has 8 divisors (see below), whose sum is σ = 598968. Its totient is φ = 197824.

The previous prime is 397469. The next prime is 397489. The reversal of 397478 is 874793.

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

It is a Curzon number.

It is a congruent number.

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, 425 + ... + 987.

It is an arithmetic number, because the mean of its divisors is an integer number (74871).

2³⁹⁷⁴⁷⁸ is an apocalyptic number.

397478 is a deficient number, since it is larger than the sum of its proper divisors (201490).

397478 is a wasteful number, since it uses less digits than its factorization.

397478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918.

The product of its digits is 42336, while the sum is 38.

The square root of 397478 is about 630.4585632696. The cubic root of 397478 is about 73.5254512565.

The spelling of 397478 in words is "three hundred ninety-seven thousand, four hundred seventy-eight".