115530728 has 8 divisors (see below), whose sum is σ = 216620130. Its totient is φ = 57765360.

The previous prime is 115530721. The next prime is 115530731. The reversal of 115530728 is 827035511.

It can be written as a sum of positive squares in only one way, i.e., 71944324 + 43586404 = 8482^2 + 6602^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×115530728² = 26694698224419968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115530694 and 115530703.

It is not an unprimeable number, because it can be changed into a prime (115530721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7220663 + ... + 7220678.

Almost surely, 2^115530728 is an apocalyptic number.

It is an amenable number.

115530728 is a deficient number, since it is larger than the sum of its proper divisors (101089402).

115530728 is a wasteful number, since it uses less digits than its factorization.

115530728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14441347 (or 14441343 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 115530728 is about 10748.5221309722. The cubic root of 115530728 is about 487.0413523712.

The spelling of 115530728 in words is "one hundred fifteen million, five hundred thirty thousand, seven hundred twenty-eight".