115440140 has 12 divisors (see below), whose sum is σ = 242424336. Its totient is φ = 46176048.

The previous prime is 115440119. The next prime is 115440161. The reversal of 115440140 is 41044511.

It is an interprime number because it is at equal distance from previous prime (115440119) and next prime (115440161).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5772007 = 115440140 / (1 + 1 + 5 + 4 + 4 + 0 + 1 + 4 + 0).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2885984 + ... + 2886023.

It is an arithmetic number, because the mean of its divisors is an integer number (20202028).

Almost surely, 2^115440140 is an apocalyptic number.

115440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115440140 is an abundant number, since it is smaller than the sum of its proper divisors (126984196).

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

115440140 is a wasteful number, since it uses less digits than its factorization.

115440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5772016 (or 5772014 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 115440140 is about 10744.3073299306. The cubic root of 115440140 is about 486.9140222101.

Adding to 115440140 its reverse (41044511), we get a palindrome (156484651).

The spelling of 115440140 in words is "one hundred fifteen million, four hundred forty thousand, one hundred forty".