397382805 has 12 divisors (see below), whose sum is σ = 688796940. Its totient is φ = 211937472.

The previous prime is 397382779. The next prime is 397382813. The reversal of 397382805 is 508283793.

It can be written as a sum of positive squares in 2 ways, for example, as 126023076 + 271359729 = 11226^2 + 16473^2 .

It is not a de Polignac number, because 397382805 - 2⁵ = 397382773 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 8830729 = 397382805 / (3 + 9 + 7 + 3 + 8 + 2 + 8 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4415320 + ... + 4415409.

It is an arithmetic number, because the mean of its divisors is an integer number (57399745).

Almost surely, 2^397382805 is an apocalyptic number.

It is an amenable number.

397382805 is a deficient number, since it is larger than the sum of its proper divisors (291414135).

397382805 is a wasteful number, since it uses less digits than its factorization.

397382805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830740 (or 8830737 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 397382805 is about 19934.4627467108. The cubic root of 397382805 is about 735.1958106646.

The spelling of 397382805 in words is "three hundred ninety-seven million, three hundred eighty-two thousand, eight hundred five".