397882605 has 32 divisors (see below), whose sum is σ = 646133760. Its totient is φ = 209054720.

The previous prime is 397882601. The next prime is 397882619. The reversal of 397882605 is 506288793.

It is not a de Polignac number, because 397882605 - 2² = 397882601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397882601) 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 31 ways as a sum of consecutive naturals, for example, 323131 + ... + 324359.

It is an arithmetic number, because the mean of its divisors is an integer number (20191680).

Almost surely, 2^397882605 is an apocalyptic number.

It is an amenable number.

397882605 is a deficient number, since it is larger than the sum of its proper divisors (248251155).

397882605 is a wasteful number, since it uses less digits than its factorization.

397882605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

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

The square root of 397882605 is about 19946.9948864484. The cubic root of 397882605 is about 735.5039073058.

The spelling of 397882605 in words is "three hundred ninety-seven million, eight hundred eighty-two thousand, six hundred five".