115406540 has 48 divisors (see below), whose sum is σ = 258062112. Its totient is φ = 43201536.

The previous prime is 115406527. The next prime is 115406549. The reversal of 115406540 is 45604511.

It is not an unprimeable number, because it can be changed into a prime (115406549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66119 + ... + 67841.

It is an arithmetic number, because the mean of its divisors is an integer number (5376294).

Almost surely, 2^115406540 is an apocalyptic number.

115406540 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 115406540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129031056).

115406540 is an abundant number, since it is smaller than the sum of its proper divisors (142655572).

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

115406540 is a wasteful number, since it uses less digits than its factorization.

115406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 115406540 is about 10742.7435974243. The cubic root of 115406540 is about 486.8667772377.

The spelling of 115406540 in words is "one hundred fifteen million, four hundred six thousand, five hundred forty".