397885318 has 8 divisors (see below), whose sum is σ = 596939400. Its totient is φ = 198905520.

The previous prime is 397885283. The next prime is 397885339. The reversal of 397885318 is 813588793.

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

It is a super-2 number, since 2×397885318² = 316625452559922248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2343 + ... + 28306.

It is an arithmetic number, because the mean of its divisors is an integer number (74617425).

Almost surely, 2^397885318 is an apocalyptic number.

397885318 is a deficient number, since it is larger than the sum of its proper divisors (199054082).

397885318 is a wasteful number, since it uses less digits than its factorization.

397885318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37142.

The product of its digits is 1451520, while the sum is 52.

The square root of 397885318 is about 19947.0628915638. The cubic root of 397885318 is about 735.5055790028.

The spelling of 397885318 in words is "three hundred ninety-seven million, eight hundred eighty-five thousand, three hundred eighteen".