722220642 has 48 divisors (see below), whose sum is σ = 1838386368. Its totient is φ = 202019040.

The previous prime is 722220619. The next prime is 722220643. The reversal of 722220642 is 246022227.

It is not an unprimeable number, because it can be changed into a prime (722220643) 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 23 ways as a sum of consecutive naturals, for example, 137718 + ... + 142865.

It is an arithmetic number, because the mean of its divisors is an integer number (38299716).

Almost surely, 2^722220642 is an apocalyptic number.

722220642 is an abundant number, since it is smaller than the sum of its proper divisors (1116165726).

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

722220642 is a wasteful number, since it uses less digits than its factorization.

722220642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280615 (or 280612 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 722220642 is about 26874.1630939458. The cubic root of 722220642 is about 897.2014476547.

Adding to 722220642 its reverse (246022227), we get a palindrome (968242869).

The spelling of 722220642 in words is "seven hundred twenty-two million, two hundred twenty thousand, six hundred forty-two".