116781540 has 48 divisors (see below), whose sum is σ = 329398272. Its totient is φ = 30912256.

The previous prime is 116781523. The next prime is 116781541. The reversal of 116781540 is 45187611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (116781541) by changing a digit.

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, 1117 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (6862464).

Almost surely, 2^116781540 is an apocalyptic number.

116781540 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 116781540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164699136).

116781540 is an abundant number, since it is smaller than the sum of its proper divisors (212616732).

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

116781540 is a wasteful number, since it uses less digits than its factorization.

116781540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14356 (or 14354 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 116781540 is about 10806.5507910711. The cubic root of 116781540 is about 488.7927241603.

The spelling of 116781540 in words is "one hundred sixteen million, seven hundred eighty-one thousand, five hundred forty".