397817814 has 8 divisors (see below), whose sum is σ = 795635640. Its totient is φ = 132605936.

The previous prime is 397817813. The next prime is 397817837. The reversal of 397817814 is 418718793.

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

397817814 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397817813) by changing a digit.

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, 33151479 + ... + 33151490.

It is an arithmetic number, because the mean of its divisors is an integer number (99454455).

Almost surely, 2^397817814 is an apocalyptic number.

397817814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397817814 is a wasteful number, since it uses less digits than its factorization.

397817814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66302974.

The product of its digits is 338688, while the sum is 48.

The square root of 397817814 is about 19945.3707411018. The cubic root of 397817814 is about 735.4639821118.

The spelling of 397817814 in words is "three hundred ninety-seven million, eight hundred seventeen thousand, eight hundred fourteen".