115143440 has 20 divisors (see below), whose sum is σ = 267708684. Its totient is φ = 46057344.

The previous prime is 115143421. The next prime is 115143443. The reversal of 115143440 is 44341511.

It can be written as a sum of positive squares in 2 ways, for example, as 26708224 + 88435216 = 5168^2 + 9404^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (115143443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719567 + ... + 719726.

Almost surely, 2^115143440 is an apocalyptic number.

115143440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115143440 is an abundant number, since it is smaller than the sum of its proper divisors (152565244).

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

115143440 is a wasteful number, since it uses less digits than its factorization.

115143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439306 (or 1439300 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 115143440 is about 10730.4911350786. The cubic root of 115143440 is about 486.4965148172.

Adding to 115143440 its reverse (44341511), we get a palindrome (159484951).

The spelling of 115143440 in words is "one hundred fifteen million, one hundred forty-three thousand, four hundred forty".