720084836 has 6 divisors (see below), whose sum is σ = 1260148470. Its totient is φ = 360042416.

The previous prime is 720084829. The next prime is 720084839. The reversal of 720084836 is 638480027.

It can be written as a sum of positive squares in only one way, i.e., 718776100 + 1308736 = 26810^2 + 1144^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 720084836.

It is not an unprimeable number, because it can be changed into a prime (720084839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90010601 + ... + 90010608.

It is an arithmetic number, because the mean of its divisors is an integer number (210024745).

Almost surely, 2^720084836 is an apocalyptic number.

It is an amenable number.

720084836 is a deficient number, since it is larger than the sum of its proper divisors (540063634).

720084836 is a wasteful number, since it uses less digits than its factorization.

720084836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180021213 (or 180021211 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 720084836 is about 26834.3965089584. The cubic root of 720084836 is about 896.3161501931.

The spelling of 720084836 in words is "seven hundred twenty million, eighty-four thousand, eight hundred thirty-six".