722428137 has 24 divisors (see below), whose sum is σ = 1091059008. Its totient is φ = 459756000.

The previous prime is 722428111. The next prime is 722428151. The reversal of 722428137 is 731824227.

722428137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 722428137 - 2¹² = 722424041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (722423137) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108762 + ... + 115212.

It is an arithmetic number, because the mean of its divisors is an integer number (45460792).

Almost surely, 2^722428137 is an apocalyptic number.

It is an amenable number.

722428137 is a deficient number, since it is larger than the sum of its proper divisors (368630871).

722428137 is a wasteful number, since it uses less digits than its factorization.

722428137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021 (or 7018 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 722428137 is about 26878.0233090159. The cubic root of 722428137 is about 897.2873618375.

The spelling of 722428137 in words is "seven hundred twenty-two million, four hundred twenty-eight thousand, one hundred thirty-seven".