720772818 has 8 divisors (see below), whose sum is σ = 1441545648. Its totient is φ = 240257604.

The previous prime is 720772769. The next prime is 720772867. The reversal of 720772818 is 818277027.

It is an interprime number because it is at equal distance from previous prime (720772769) and next prime (720772867).

It is a sphenic number, since it is the product of 3 distinct primes.

720772818 is an admirable number.

It is a super-2 number, since 2×720772818² = 1039026910335322248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 720772818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60064396 + ... + 60064407.

It is an arithmetic number, because the mean of its divisors is an integer number (180193206).

Almost surely, 2^720772818 is an apocalyptic number.

720772818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

720772818 is a wasteful number, since it uses less digits than its factorization.

720772818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120128808.

The product of its (nonzero) digits is 87808, while the sum is 42.

The square root of 720772818 is about 26847.2124810007. The cubic root of 720772818 is about 896.6015115214.

The spelling of 720772818 in words is "seven hundred twenty million, seven hundred seventy-two thousand, eight hundred eighteen".