397644 has 24 divisors (see below), whose sum is σ = 999600. Its totient is φ = 122304.

The previous prime is 397643. The next prime is 397673. The reversal of 397644 is 446793.

397644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (397643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1119 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (41650).

2³⁹⁷⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

397644 is an abundant number, since it is smaller than the sum of its proper divisors (601956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397644 is a wasteful number, since it uses less digits than its factorization.

397644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569 (or 2567 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 397644 is about 630.5901997336. The cubic root of 397644 is about 73.5356853878.

It can be divided in two parts, 39 and 7644, that multiplied together give a square (298116 = 546²).

The spelling of 397644 in words is "three hundred ninety-seven thousand, six hundred forty-four".