720786445 has 8 divisors (see below), whose sum is σ = 894769560. Its totient is φ = 556745280.

The previous prime is 720786419. The next prime is 720786463. The reversal of 720786445 is 544687027.

720786445 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 302133924 + 418652521 = 17382^2 + 20461^2 .

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

It is not a de Polignac number, because 720786445 - 2⁷ = 720786317 is a prime.

It is a congruent number.

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, 2485326 + ... + 2485615.

It is an arithmetic number, because the mean of its divisors is an integer number (111846195).

Almost surely, 2^720786445 is an apocalyptic number.

It is an amenable number.

720786445 is a deficient number, since it is larger than the sum of its proper divisors (173983115).

720786445 is a wasteful number, since it uses less digits than its factorization.

720786445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970975.

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 720786445 is about 26847.4662677877. The cubic root of 720786445 is about 896.6071618972.

The spelling of 720786445 in words is "seven hundred twenty million, seven hundred eighty-six thousand, four hundred forty-five".