118138240 has 128 divisors (see below), whose sum is σ = 313074720. Its totient is φ = 42270720.

The previous prime is 118138193. The next prime is 118138247. The reversal of 118138240 is 42831811.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 118138199 and 118138208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118138247) 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, 682794 + ... + 682966.

Almost surely, 2^118138240 is an apocalyptic number.

118138240 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 118138240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156537360).

118138240 is an abundant number, since it is smaller than the sum of its proper divisors (194936480).

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

118138240 is a wasteful number, since it uses less digits than its factorization.

118138240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 118138240 is about 10869.1416404425. The cubic root of 118138240 is about 490.6782776605.

The spelling of 118138240 in words is "one hundred eighteen million, one hundred thirty-eight thousand, two hundred forty".