728953261922 has 6 divisors (see below), whose sum is σ = 1093431704043. Its totient is φ = 364476027242.

The previous prime is 728953261913. The next prime is 728953261951. The reversal of 728953261922 is 229162359827.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 364476630961 + 364476630961 = 603719^2 + 603719^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=603719.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 905579 + ... + 1509297.

Almost surely, 2^728953261922 is an apocalyptic number.

728953261922 is a deficient number, since it is larger than the sum of its proper divisors (364478442121).

728953261922 is an frugal number, since it uses more digits than its factorization.

728953261922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207440 (or 603721 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The spelling of 728953261922 in words is "seven hundred twenty-eight billion, nine hundred fifty-three million, two hundred sixty-one thousand, nine hundred twenty-two".