118169640 has 48 divisors (see below), whose sum is σ = 384052500. Its totient is φ = 31511808.

The previous prime is 118169629. The next prime is 118169641. The reversal of 118169640 is 46961811.

It is a happy number.

118169640 is a `hidden beast` number, since 1 + 1 + 8 + 1 + 6 + 9 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 113934276 + 4235364 = 10674^2 + 2058^2 .

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 = 118169595 and 118169604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118169641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163765 + ... + 164484.

Almost surely, 2^118169640 is an apocalyptic number.

118169640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

118169640 is an abundant number, since it is smaller than the sum of its proper divisors (265882860).

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

118169640 is a wasteful number, since it uses less digits than its factorization.

118169640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328266 (or 328259 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 118169640 is about 10870.5860007637. The cubic root of 118169640 is about 490.7217463209.

The spelling of 118169640 in words is "one hundred eighteen million, one hundred sixty-nine thousand, six hundred forty".