397806285 has 8 divisors (see below), whose sum is σ = 636490080. Its totient is φ = 212163344.

The previous prime is 397806271. The next prime is 397806319. The reversal of 397806285 is 582608793.

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

It is a cyclic number.

It is not a de Polignac number, because 397806285 - 2⁶ = 397806221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13260195 + ... + 13260224.

It is an arithmetic number, because the mean of its divisors is an integer number (79561260).

Almost surely, 2^397806285 is an apocalyptic number.

It is an amenable number.

397806285 is a deficient number, since it is larger than the sum of its proper divisors (238683795).

397806285 is a wasteful number, since it uses less digits than its factorization.

397806285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26520427.

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 397806285 is about 19945.0817245756. The cubic root of 397806285 is about 735.4568773134.

The spelling of 397806285 in words is "three hundred ninety-seven million, eight hundred six thousand, two hundred eighty-five".