718840 has 16 divisors (see below), whose sum is σ = 1617480. Its totient is φ = 287520.

The previous prime is 718813. The next prime is 718841. The reversal of 718840 is 48817.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 718799 and 718808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (718841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8946 + ... + 9025.

2⁷¹⁸⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

718840 is an abundant number, since it is smaller than the sum of its proper divisors (898640).

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

718840 is a wasteful number, since it uses less digits than its factorization.

718840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982 (or 17978 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 718840 is about 847.8443253334. The cubic root of 718840 is about 89.5799354519.

It can be divided in two parts, 71 and 8840, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 718840 in words is "seven hundred eighteen thousand, eight hundred forty".