115869312 has 128 divisors (see below), whose sum is σ = 368424000. Its totient is φ = 35638272.

The previous prime is 115869307. The next prime is 115869319. The reversal of 115869312 is 213968511.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (115869319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43639 + ... + 46217.

Almost surely, 2^115869312 is an apocalyptic number.

115869312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115869312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184212000).

115869312 is an abundant number, since it is smaller than the sum of its proper divisors (252554688).

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

115869312 is a wasteful number, since it uses less digits than its factorization.

115869312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2615 (or 2597 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 115869312 is about 10764.2608664042. The cubic root of 115869312 is about 487.5166763526.

The spelling of 115869312 in words is "one hundred fifteen million, eight hundred sixty-nine thousand, three hundred twelve".