718440 has 32 divisors (see below), whose sum is σ = 2155680. Its totient is φ = 191552.

The previous prime is 718433. The next prime is 718453. The reversal of 718440 is 44817.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 718440.

It is an unprimeable number.

718440 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2874 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (67365).

2⁷¹⁸⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

718440 is an abundant number, since it is smaller than the sum of its proper divisors (1437240).

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

718440 is a wasteful number, since it uses less digits than its factorization.

718440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001 (or 5997 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 718440 is about 847.6084001471. The cubic root of 718440 is about 89.5633167224.

The spelling of 718440 in words is "seven hundred eighteen thousand, four hundred forty".