115503444 has 72 divisors (see below), whose sum is σ = 338706368. Its totient is φ = 32503680.

The previous prime is 115503371. The next prime is 115503449. The reversal of 115503444 is 444305511.

It is a happy number.

115503444 is a `hidden beast` number, since 115 + 503 + 4 + 44 = 666.

It is a super-2 number, since 2×115503444² = 26682091151722272, which contains 22 as substring.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115503449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13464 + ... + 20304.

Almost surely, 2^115503444 is an apocalyptic number.

115503444 is a gapful number since it is divisible by the number (14) 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 115503444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169353184).

115503444 is an abundant number, since it is smaller than the sum of its proper divisors (223202924).

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

115503444 is a wasteful number, since it uses less digits than its factorization.

115503444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925 (or 6920 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 115503444 is about 10747.2528582889. The cubic root of 115503444 is about 487.0030090874.

Adding to 115503444 its reverse (444305511), we get a palindrome (559808955).

The spelling of 115503444 in words is "one hundred fifteen million, five hundred three thousand, four hundred forty-four".