115133440 has 88 divisors (see below), whose sum is σ = 280029600. Its totient is φ = 45416448.

The previous prime is 115133399. The next prime is 115133443. The reversal of 115133440 is 44331511.

It is not an unprimeable number, because it can be changed into a prime (115133443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578461 + ... + 578659.

Almost surely, 2^115133440 is an apocalyptic number.

115133440 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 115133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140014800).

115133440 is an abundant number, since it is smaller than the sum of its proper divisors (164896160).

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

115133440 is a wasteful number, since it uses less digits than its factorization.

115133440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 115133440 is about 10730.0251630646. The cubic root of 115133440 is about 486.4824306280.

Adding to 115133440 its reverse (44331511), we get a palindrome (159464951).

The spelling of 115133440 in words is "one hundred fifteen million, one hundred thirty-three thousand, four hundred forty".