116639640 has 96 divisors (see below), whose sum is σ = 408255120. Its totient is φ = 28710144.

The previous prime is 116639623. The next prime is 116639641. The reversal of 116639640 is 46936611.

116639640 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 3 + 9 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 116639595 and 116639604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116639641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7782 + ... + 17141.

Almost surely, 2^116639640 is an apocalyptic number.

116639640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

116639640 is an abundant number, since it is smaller than the sum of its proper divisors (291615480).

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

116639640 is a wasteful number, since it uses less digits than its factorization.

116639640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24953 (or 24946 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 116639640 is about 10799.9833333205. The cubic root of 116639640 is about 488.5946683166.

The spelling of 116639640 in words is "one hundred sixteen million, six hundred thirty-nine thousand, six hundred forty".