118638842 has 16 divisors (see below), whose sum is σ = 205396992. Its totient is φ = 50341200.

The previous prime is 118638833. The next prime is 118638847. The reversal of 118638842 is 248836811.

It is a super-2 number, since 2×118638842² = 28150349662201928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 118638842.

It is not an unprimeable number, because it can be changed into a prime (118638847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40538 + ... + 43365.

It is an arithmetic number, because the mean of its divisors is an integer number (12837312).

Almost surely, 2^118638842 is an apocalyptic number.

118638842 is a deficient number, since it is larger than the sum of its proper divisors (86758150).

118638842 is a wasteful number, since it uses less digits than its factorization.

118638842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84013.

The product of its digits is 73728, while the sum is 41.

The square root of 118638842 is about 10892.1458859125. The cubic root of 118638842 is about 491.3703719081.

The spelling of 118638842 in words is "one hundred eighteen million, six hundred thirty-eight thousand, eight hundred forty-two".