115213728 has 48 divisors (see below), whose sum is σ = 345643200. Its totient is φ = 32918016.

The previous prime is 115213717. The next prime is 115213733. The reversal of 115213728 is 827312511.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 115213695 and 115213704.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85053 + ... + 86396.

It is an arithmetic number, because the mean of its divisors is an integer number (7200900).

Almost surely, 2^115213728 is an apocalyptic number.

It is an amenable number.

115213728 is an abundant number, since it is smaller than the sum of its proper divisors (230429472).

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

115213728 is a wasteful number, since it uses less digits than its factorization.

115213728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171469 (or 171461 counting only the distinct ones).

The product of its digits is 3360, while the sum is 30.

The square root of 115213728 is about 10733.7657883895. The cubic root of 115213728 is about 486.5954867645.

The spelling of 115213728 in words is "one hundred fifteen million, two hundred thirteen thousand, seven hundred twenty-eight".