720777222 has 24 divisors (see below), whose sum is σ = 1703655720. Its totient is φ = 218417280.

The previous prime is 720777191. The next prime is 720777227. The reversal of 720777222 is 222777027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720777227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1819947 + ... + 1820342.

It is an arithmetic number, because the mean of its divisors is an integer number (70985655).

Almost surely, 2^720777222 is an apocalyptic number.

720777222 is an abundant number, since it is smaller than the sum of its proper divisors (982878498).

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

720777222 is a wasteful number, since it uses less digits than its factorization.

720777222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640308 (or 3640305 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The square root of 720777222 is about 26847.2945005637. The cubic root of 720777222 is about 896.6033376285.

The spelling of 720777222 in words is "seven hundred twenty million, seven hundred seventy-seven thousand, two hundred twenty-two".