722450420 has 24 divisors (see below), whose sum is σ = 1545773544. Its totient is φ = 283527296.

The previous prime is 722450383. The next prime is 722450431. The reversal of 722450420 is 24054227.

It can be written as a sum of positive squares in 4 ways, for example, as 3888784 + 718561636 = 1972^2 + 26806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 722450420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339719 + ... + 341838.

It is an arithmetic number, because the mean of its divisors is an integer number (64407231).

Almost surely, 2^722450420 is an apocalyptic number.

It is an amenable number.

722450420 is an abundant number, since it is smaller than the sum of its proper divisors (823323124).

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

722450420 is a wasteful number, since it uses less digits than its factorization.

722450420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681619 (or 681617 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 722450420 is about 26878.4378266297. The cubic root of 722450420 is about 897.2965872297.

The spelling of 722450420 in words is "seven hundred twenty-two million, four hundred fifty thousand, four hundred twenty".