718644 has 12 divisors (see below), whose sum is σ = 1676864. Its totient is φ = 239544.

The previous prime is 718633. The next prime is 718657. The reversal of 718644 is 446817.

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

It is a congruent number.

It is an unprimeable number.

718644 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 3 ways as a sum of consecutive naturals, for example, 29932 + ... + 29955.

2⁷¹⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

718644 is an abundant number, since it is smaller than the sum of its proper divisors (958220).

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

718644 is a wasteful number, since it uses less digits than its factorization.

718644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59894 (or 59892 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 718644 is about 847.7287301962. The cubic root of 718644 is about 89.5717930450.

The spelling of 718644 in words is "seven hundred eighteen thousand, six hundred forty-four".