964644 has 12 divisors (see below), whose sum is σ = 2250864. Its totient is φ = 321544.

The previous prime is 964637. The next prime is 964661. The reversal of 964644 is 446469.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40182 + ... + 40205.

It is an arithmetic number, because the mean of its divisors is an integer number (187572).

2⁹⁶⁴⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

964644 is an abundant number, since it is smaller than the sum of its proper divisors (1286220).

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

964644 is a wasteful number, since it uses less digits than its factorization.

964644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80394 (or 80392 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 964644 is about 982.1629192756. The cubic root of 964644 is about 98.8072978377.

It can be divided in two parts, 9646 and 44, that multiplied together give a palindrome (424424).

The spelling of 964644 in words is "nine hundred sixty-four thousand, six hundred forty-four".