718220 has 12 divisors (see below), whose sum is σ = 1508304. Its totient is φ = 287280.

The previous prime is 718187. The next prime is 718241. The reversal of 718220 is 22817.

718220 = 114² + 115² + ... + 153².

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 35911 = 718220 / (7 + 1 + 8 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 718192 and 718201.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 17936 + ... + 17975.

It is an arithmetic number, because the mean of its divisors is an integer number (125692).

2⁷¹⁸²²⁰ is an apocalyptic number.

It is an amenable number.

718220 is an abundant number, since it is smaller than the sum of its proper divisors (790084).

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

718220 is a wasteful number, since it uses less digits than its factorization.

718220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35920 (or 35918 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 718220 is about 847.4786132995. The cubic root of 718220 is about 89.5541737918.

The spelling of 718220 in words is "seven hundred eighteen thousand, two hundred twenty".