706644 has 36 divisors (see below), whose sum is σ = 1854944. Its totient is φ = 235224.

The previous prime is 706633. The next prime is 706661. The reversal of 706644 is 446607.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 609 + ... + 1335.

2⁷⁰⁶⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 706644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927472).

706644 is an abundant number, since it is smaller than the sum of its proper divisors (1148300).

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

706644 is a wasteful number, since it uses less digits than its factorization.

706644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 706644 is about 840.6211988762. The cubic root of 706644 is about 89.0704319805.

The spelling of 706644 in words is "seven hundred six thousand, six hundred forty-four".