728611286628 has 12 divisors (see below), whose sum is σ = 1700093002160. Its totient is φ = 242870428872.

The previous prime is 728611286479. The next prime is 728611286629. The reversal of 728611286628 is 826682116827.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×728611286628² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728611286629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30358803598 + ... + 30358803621.

Almost surely, 2^728611286628 is an apocalyptic number.

It is an amenable number.

728611286628 is an abundant number, since it is smaller than the sum of its proper divisors (971481715532).

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

728611286628 is a wasteful number, since it uses less digits than its factorization.

728611286628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60717607226 (or 60717607224 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 57.

The spelling of 728611286628 in words is "seven hundred twenty-eight billion, six hundred eleven million, two hundred eighty-six thousand, six hundred twenty-eight".