720738835 has 4 divisors (see below), whose sum is σ = 864886608. Its totient is φ = 576591064.

The previous prime is 720738803. The next prime is 720738853. The reversal of 720738835 is 538837027.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 720738835 - 2⁵ = 720738803 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720738791 and 720738800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72073879 + ... + 72073888.

It is an arithmetic number, because the mean of its divisors is an integer number (216221652).

Almost surely, 2^720738835 is an apocalyptic number.

720738835 is a deficient number, since it is larger than the sum of its proper divisors (144147773).

720738835 is a wasteful number, since it uses less digits than its factorization.

720738835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144147772.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 720738835 is about 26846.5795772944. The cubic root of 720738835 is about 896.5874203093.

It can be divided in two parts, 72073 and 8835, that added together give a palindrome (80908).

The spelling of 720738835 in words is "seven hundred twenty million, seven hundred thirty-eight thousand, eight hundred thirty-five".