718340 has 36 divisors (see below), whose sum is σ = 1757196. Its totient is φ = 245952.

The previous prime is 718337. The next prime is 718343. The reversal of 718340 is 43817.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (718337) and next prime (718343).

It can be written as a sum of positive squares in 2 ways, for example, as 529984 + 188356 = 728^2 + 434^2 .

It is not an unprimeable number, because it can be changed into a prime (718343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614 + ... + 1346.

It is an arithmetic number, because the mean of its divisors is an integer number (48811).

2⁷¹⁸³⁴⁰ is an apocalyptic number.

718340 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 718340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (878598).

718340 is an abundant number, since it is smaller than the sum of its proper divisors (1038856).

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

718340 is a wasteful number, since it uses less digits than its factorization.

718340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 747 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 718340 is about 847.5494085893. The cubic root of 718340 is about 89.5591610763.

The spelling of 718340 in words is "seven hundred eighteen thousand, three hundred forty".