720735715 has 16 divisors (see below), whose sum is σ = 989537472. Its totient is φ = 493668864.

The previous prime is 720735703. The next prime is 720735731. The reversal of 720735715 is 517537027.

It is a cyclic number.

It is not a de Polignac number, because 720735715 - 2¹³ = 720727523 is a prime.

It is a super-2 number, since 2×720735715² = 1038919941753122450, which contains 22 as substring.

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, 21807 + ... + 43783.

It is an arithmetic number, because the mean of its divisors is an integer number (61846092).

Almost surely, 2^720735715 is an apocalyptic number.

720735715 is a deficient number, since it is larger than the sum of its proper divisors (268801757).

720735715 is a wasteful number, since it uses less digits than its factorization.

720735715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22926.

The product of its (nonzero) digits is 51450, while the sum is 37.

The square root of 720735715 is about 26846.5214692705. The cubic root of 720735715 is about 896.5861265643.

The spelling of 720735715 in words is "seven hundred twenty million, seven hundred thirty-five thousand, seven hundred fifteen".