115009400 has 96 divisors (see below), whose sum is σ = 296833680. Its totient is φ = 41088000.

The previous prime is 115009399. The next prime is 115009409. The reversal of 115009400 is 4900511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115009409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133772 + ... + 134628.

Almost surely, 2^115009400 is an apocalyptic number.

115009400 is a gapful number since it is divisible by the number (10) 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 115009400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148416840).

115009400 is an abundant number, since it is smaller than the sum of its proper divisors (181824280).

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

115009400 is a wasteful number, since it uses less digits than its factorization.

115009400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 115009400 is about 10724.2435630677. The cubic root of 115009400 is about 486.3076625093.

Adding to 115009400 its reverse (4900511), we get a palindrome (119909911).

The spelling of 115009400 in words is "one hundred fifteen million, nine thousand, four hundred".