718651444 has 72 divisors (see below), whose sum is σ = 1539792072. Its totient is φ = 292239360.

The previous prime is 718651429. The next prime is 718651457. The reversal of 718651444 is 444156817.

It can be written as a sum of positive squares in 4 ways, for example, as 262828944 + 455822500 = 16212^2 + 21350^2 .

It is a junction number, because it is equal to n+sod(n) for n = 718651397 and 718651406.

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, 296124 + ... + 298540.

It is an arithmetic number, because the mean of its divisors is an integer number (21386001).

Almost surely, 2^718651444 is an apocalyptic number.

718651444 is a gapful number since it is divisible by the number (74) 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 718651444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (769896036).

718651444 is an abundant number, since it is smaller than the sum of its proper divisors (821140628).

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

718651444 is a wasteful number, since it uses less digits than its factorization.

718651444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513 (or 2504 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 718651444 is about 26807.6750950171. The cubic root of 718651444 is about 895.7210231734.

The spelling of 718651444 in words is "seven hundred eighteen million, six hundred fifty-one thousand, four hundred forty-four".