115638280 has 16 divisors (see below), whose sum is σ = 260186220. Its totient is φ = 46255296.

The previous prime is 115638251. The next prime is 115638287. The reversal of 115638280 is 82836511.

It can be written as a sum of positive squares in 2 ways, for example, as 106626276 + 9012004 = 10326^2 + 3002^2 .

It is not an unprimeable number, because it can be changed into a prime (115638287) 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, 1445439 + ... + 1445518.

Almost surely, 2^115638280 is an apocalyptic number.

115638280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115638280 is an abundant number, since it is smaller than the sum of its proper divisors (144547940).

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

115638280 is a wasteful number, since it uses less digits than its factorization.

115638280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2890968 (or 2890964 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 115638280 is about 10753.5240735305. The cubic root of 115638280 is about 487.1924406746.

The spelling of 115638280 in words is "one hundred fifteen million, six hundred thirty-eight thousand, two hundred eighty".