718398720 has 540 divisors, whose sum is σ = 2851398396. Its totient is φ = 172523520.

The previous prime is 718398677. The next prime is 718398731. The reversal of 718398720 is 27893817.

It can be written as a sum of positive squares in 6 ways, for example, as 329204736 + 389193984 = 18144^2 + 19728^2 .

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 17521900 + ... + 17521940.

Almost surely, 2^718398720 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 718398720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425699198).

718398720 is an abundant number, since it is smaller than the sum of its proper divisors (2132999676).

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

718398720 is a wasteful number, since it uses less digits than its factorization.

718398720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 718398720 is about 26802.9610304533. The cubic root of 718398720 is about 895.6160131845.

The spelling of 718398720 in words is "seven hundred eighteen million, three hundred ninety-eight thousand, seven hundred twenty".