720268445 has 16 divisors (see below), whose sum is σ = 935550000. Its totient is φ = 529181184.

The previous prime is 720268411. The next prime is 720268453. The reversal of 720268445 is 544862027.

It can be written as a sum of positive squares in 8 ways, for example, as 68079001 + 652189444 = 8251^2 + 25538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720268445 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 720268399 and 720268408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15320 + ... + 40929.

It is an arithmetic number, because the mean of its divisors is an integer number (58471875).

Almost surely, 2^720268445 is an apocalyptic number.

It is an amenable number.

720268445 is a deficient number, since it is larger than the sum of its proper divisors (215281555).

720268445 is a wasteful number, since it uses less digits than its factorization.

720268445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56464.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 720268445 is about 26837.8174410663. The cubic root of 720268445 is about 896.3923253501.

The spelling of 720268445 in words is "seven hundred twenty million, two hundred sixty-eight thousand, four hundred forty-five".