396420685 has 8 divisors (see below), whose sum is σ = 481050360. Its totient is φ = 313572864.

The previous prime is 396420679. The next prime is 396420743. The reversal of 396420685 is 586024693.

It can be written as a sum of positive squares in 4 ways, for example, as 1643524 + 394777161 = 1282^2 + 19869^2 .

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 396420685 - 2²⁷ = 262202957 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, 444972 + ... + 445861.

It is an arithmetic number, because the mean of its divisors is an integer number (60131295).

Almost surely, 2^396420685 is an apocalyptic number.

It is an amenable number.

396420685 is a deficient number, since it is larger than the sum of its proper divisors (84629675).

396420685 is an equidigital number, since it uses as much as digits as its factorization.

396420685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890927.

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 396420685 is about 19910.3160447041. The cubic root of 396420685 is about 734.6019934723.

It can be divided in two parts, 3964 and 20685, that added together give a square (24649 = 157²).

The spelling of 396420685 in words is "three hundred ninety-six million, four hundred twenty thousand, six hundred eighty-five".