115781340 has 48 divisors (see below), whose sum is σ = 335371680. Its totient is φ = 29809920.

The previous prime is 115781329. The next prime is 115781353. The reversal of 115781340 is 43187511.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 115781298 and 115781307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31531 + ... + 35010.

It is an arithmetic number, because the mean of its divisors is an integer number (6986910).

Almost surely, 2^115781340 is an apocalyptic number.

115781340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115781340 is an abundant number, since it is smaller than the sum of its proper divisors (219590340).

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

115781340 is a wasteful number, since it uses less digits than its factorization.

115781340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66582 (or 66580 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 115781340 is about 10760.1737904181. The cubic root of 115781340 is about 487.3932652588.

The spelling of 115781340 in words is "one hundred fifteen million, seven hundred eighty-one thousand, three hundred forty".