718720385 has 8 divisors (see below), whose sum is σ = 870377640. Its totient is φ = 569700864.

The previous prime is 718720367. The next prime is 718720397. The reversal of 718720385 is 583027817.

718720385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 68674369 + 650046016 = 8287^2 + 25496^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 718720385 - 2⁸ = 718720129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658832 + ... + 659921.

It is an arithmetic number, because the mean of its divisors is an integer number (108797205).

Almost surely, 2^718720385 is an apocalyptic number.

It is an amenable number.

718720385 is a deficient number, since it is larger than the sum of its proper divisors (151657255).

718720385 is a wasteful number, since it uses less digits than its factorization.

718720385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318867.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 718720385 is about 26808.9609086216. The cubic root of 718720385 is about 895.7496647488.

It can be divided in two parts, 7187 and 20385, that added together give a palindrome (27572).

The spelling of 718720385 in words is "seven hundred eighteen million, seven hundred twenty thousand, three hundred eighty-five".