115031440 has 40 divisors (see below), whose sum is σ = 268107840. Its totient is φ = 45899136.

The previous prime is 115031387. The next prime is 115031459. The reversal of 115031440 is 44130511.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35821 + ... + 38899.

It is an arithmetic number, because the mean of its divisors is an integer number (6702696).

Almost surely, 2^115031440 is an apocalyptic number.

115031440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115031440 is an abundant number, since it is smaller than the sum of its proper divisors (153076400).

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

115031440 is a wasteful number, since it uses less digits than its factorization.

115031440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559 (or 3553 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 115031440 is about 10725.2710921449. The cubic root of 115031440 is about 486.3387252928.

Adding to 115031440 its reverse (44130511), we get a palindrome (159161951).

The spelling of 115031440 in words is "one hundred fifteen million, thirty-one thousand, four hundred forty".