718218540 has 144 divisors (see below), whose sum is σ = 2422108416. Its totient is φ = 171072000.

The previous prime is 718218521. The next prime is 718218559. The reversal of 718218540 is 45812817.

718218540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (718218521) and next prime (718218559).

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 = 718218495 and 718218504.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67590 + ... + 77490.

Almost surely, 2^718218540 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 718218540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211054208).

718218540 is an abundant number, since it is smaller than the sum of its proper divisors (1703889876).

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

718218540 is a wasteful number, since it uses less digits than its factorization.

718218540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9960 (or 9955 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 718218540 is about 26799.5996238750. The cubic root of 718218540 is about 895.5411310975.

The spelling of 718218540 in words is "seven hundred eighteen million, two hundred eighteen thousand, five hundred forty".