728625811222 has 4 divisors (see below), whose sum is σ = 1092938716836. Its totient is φ = 364312905610.

The previous prime is 728625811219. The next prime is 728625811223. The reversal of 728625811222 is 222118526827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222118526827 = 123001 ⋅1805827.

It is a super-2 number, since 2×728625811222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728625811223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182156452804 + ... + 182156452807.

It is an arithmetic number, because the mean of its divisors is an integer number (273234679209).

Almost surely, 2^728625811222 is an apocalyptic number.

728625811222 is a deficient number, since it is larger than the sum of its proper divisors (364312905614).

728625811222 is a wasteful number, since it uses less digits than its factorization.

728625811222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364312905613.

The product of its digits is 430080, while the sum is 46.

The spelling of 728625811222 in words is "seven hundred twenty-eight billion, six hundred twenty-five million, eight hundred eleven thousand, two hundred twenty-two".