396644 has 24 divisors (see below), whose sum is σ = 776160. Its totient is φ = 176256.

The previous prime is 396637. The next prime is 396647. The reversal of 396644 is 446693.

396644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 396644.

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

396644 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139 + ... + 1445.

It is an arithmetic number, because the mean of its divisors is an integer number (32340).

2³⁹⁶⁶⁴⁴ is an apocalyptic number.

396644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

396644 is a deficient number, since it is larger than the sum of its proper divisors (379516).

396644 is a wasteful number, since it uses less digits than its factorization.

396644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 345 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 396644 is about 629.7967926244. The cubic root of 396644 is about 73.4739908282.

The spelling of 396644 in words is "three hundred ninety-six thousand, six hundred forty-four".