720226865 has 16 divisors (see below), whose sum is σ = 885677760. Its totient is φ = 562061760.

The previous prime is 720226847. The next prime is 720226883. The reversal of 720226865 is 568622027.

It is an interprime number because it is at equal distance from previous prime (720226847) and next prime (720226883).

It is a de Polignac number, because none of the positive numbers 2^k-720226865 is a prime.

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, 29327 + ... + 47963.

It is an arithmetic number, because the mean of its divisors is an integer number (55354860).

Almost surely, 2^720226865 is an apocalyptic number.

It is an amenable number.

720226865 is a deficient number, since it is larger than the sum of its proper divisors (165450895).

720226865 is a wasteful number, since it uses less digits than its factorization.

720226865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18832.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 720226865 is about 26837.0427767293. The cubic root of 720226865 is about 896.3750758971.

It can be divided in two parts, 72022 and 6865, that added together give a palindrome (78887).

The spelling of 720226865 in words is "seven hundred twenty million, two hundred twenty-six thousand, eight hundred sixty-five".