718422840 has 96 divisors (see below), whose sum is σ = 2364523200. Its totient is φ = 189146880.

The previous prime is 718422833. The next prime is 718422877. The reversal of 718422840 is 48224817.

It is a super-2 number, since 2×718422840² = 1032262754067331200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 718422795 and 718422804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15810 + ... + 41070.

It is an arithmetic number, because the mean of its divisors is an integer number (24630450).

Almost surely, 2^718422840 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 718422840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182261600).

718422840 is an abundant number, since it is smaller than the sum of its proper divisors (1646100360).

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

718422840 is a wasteful number, since it uses less digits than its factorization.

718422840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25357 (or 25350 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 718422840 is about 26803.4109769634. The cubic root of 718422840 is about 895.6260364097.

The spelling of 718422840 in words is "seven hundred eighteen million, four hundred twenty-two thousand, eight hundred forty".