397914278 has 8 divisors (see below), whose sum is σ = 617453280. Its totient is φ = 192096520.

The previous prime is 397914277. The next prime is 397914299. The reversal of 397914278 is 872419793.

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

It is a super-2 number, since 2×397914278² = 316671545272522568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397914277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3430238 + ... + 3430353.

It is an arithmetic number, because the mean of its divisors is an integer number (77181660).

Almost surely, 2^397914278 is an apocalyptic number.

397914278 is a deficient number, since it is larger than the sum of its proper divisors (219539002).

397914278 is a wasteful number, since it uses less digits than its factorization.

397914278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860622.

The product of its digits is 762048, while the sum is 50.

The square root of 397914278 is about 19947.7887997642. The cubic root of 397914278 is about 735.5234231101.

The spelling of 397914278 in words is "three hundred ninety-seven million, nine hundred fourteen thousand, two hundred seventy-eight".