396645 has 16 divisors (see below), whose sum is σ = 655872. Its totient is φ = 204480.

The previous prime is 396637. The next prime is 396647. The reversal of 396645 is 546693.

It is a happy number.

It is not a de Polignac number, because 396645 - 2³ = 396637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39 + ... + 891.

It is an arithmetic number, because the mean of its divisors is an integer number (40992).

2³⁹⁶⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

396645 is a deficient number, since it is larger than the sum of its proper divisors (259227).

396645 is a wasteful number, since it uses less digits than its factorization.

396645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 19440, while the sum is 33.

The square root of 396645 is about 629.7975865308. The cubic root of 396645 is about 73.4740525745.

The spelling of 396645 in words is "three hundred ninety-six thousand, six hundred forty-five".