728722615158 has 48 divisors (see below), whose sum is σ = 1590351628320. Its totient is φ = 241149257088.

The previous prime is 728722615157. The next prime is 728722615183. The reversal of 728722615158 is 851516227827.

It is a happy number.

728722615158 is a `hidden beast` number, since 7 + 2 + 8 + 7 + 2 + 2 + 615 + 15 + 8 = 666.

728722615158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728722615157) 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, 2243698 + ... + 2547866.

It is an arithmetic number, because the mean of its divisors is an integer number (33132325590).

Almost surely, 2^728722615158 is an apocalyptic number.

728722615158 is an abundant number, since it is smaller than the sum of its proper divisors (861629013162).

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

728722615158 is a wasteful number, since it uses less digits than its factorization.

728722615158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305141 (or 305138 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The spelling of 728722615158 in words is "seven hundred twenty-eight billion, seven hundred twenty-two million, six hundred fifteen thousand, one hundred fifty-eight".