397635705 has 24 divisors (see below), whose sum is σ = 725512320. Its totient is φ = 200910240.

The previous prime is 397635691. The next prime is 397635709. The reversal of 397635705 is 507536793.

397635705 is a `hidden beast` number, since 3 + 9 + 7 + 635 + 7 + 0 + 5 = 666.

It is not a de Polignac number, because 397635705 - 2⁸ = 397635449 is a prime.

It is a super-2 number, since 2×397635705² = 316228307781694050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (397635709) 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 23 ways as a sum of consecutive naturals, for example, 231681 + ... + 233390.

It is an arithmetic number, because the mean of its divisors is an integer number (30229680).

Almost surely, 2^397635705 is an apocalyptic number.

It is an amenable number.

397635705 is a deficient number, since it is larger than the sum of its proper divisors (327876615).

397635705 is a wasteful number, since it uses less digits than its factorization.

397635705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465101 (or 465098 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 45.

The square root of 397635705 is about 19940.8050238700. The cubic root of 397635705 is about 735.3517405715.

The spelling of 397635705 in words is "three hundred ninety-seven million, six hundred thirty-five thousand, seven hundred five".