118686438 has 32 divisors (see below), whose sum is σ = 284037600. Its totient is φ = 36518688.

The previous prime is 118686427. The next prime is 118686457. The reversal of 118686438 is 834686811.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 118686393 and 118686402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83833 + ... + 85236.

It is an arithmetic number, because the mean of its divisors is an integer number (8876175).

Almost surely, 2^118686438 is an apocalyptic number.

118686438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

118686438 is an abundant number, since it is smaller than the sum of its proper divisors (165351162).

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

118686438 is a wasteful number, since it uses less digits than its factorization.

118686438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169093 (or 169087 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 118686438 is about 10894.3305439114. The cubic root of 118686438 is about 491.4360730927.

The spelling of 118686438 in words is "one hundred eighteen million, six hundred eighty-six thousand, four hundred thirty-eight".