396946905 has 8 divisors (see below), whose sum is σ = 635115072. Its totient is φ = 211705008.

The previous prime is 396946883. The next prime is 396946933. The reversal of 396946905 is 509649693.

It is a happy number.

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

It is not a de Polignac number, because 396946905 - 2⁷ = 396946777 is a prime.

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, 13231549 + ... + 13231578.

It is an arithmetic number, because the mean of its divisors is an integer number (79389384).

Almost surely, 2^396946905 is an apocalyptic number.

It is an amenable number.

396946905 is a deficient number, since it is larger than the sum of its proper divisors (238168167).

396946905 is a wasteful number, since it uses less digits than its factorization.

396946905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26463135.

The product of its (nonzero) digits is 1574640, while the sum is 51.

The square root of 396946905 is about 19923.5264197882. The cubic root of 396946905 is about 734.9268935571.

The spelling of 396946905 in words is "three hundred ninety-six million, nine hundred forty-six thousand, nine hundred five".