118420638 has 32 divisors (see below), whose sum is σ = 271627776. Its totient is φ = 33715488.

The previous prime is 118420591. The next prime is 118420649. The reversal of 118420638 is 836024811.

It is a junction number, because it is equal to n+sod(n) for n = 118420599 and 118420608.

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, 7495 + ... + 17117.

It is an arithmetic number, because the mean of its divisors is an integer number (8488368).

Almost surely, 2^118420638 is an apocalyptic number.

118420638 is an abundant number, since it is smaller than the sum of its proper divisors (153207138).

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

118420638 is a wasteful number, since it uses less digits than its factorization.

118420638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9928.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 118420638 is about 10882.1247006272. The cubic root of 118420638 is about 491.0689394837.

The spelling of 118420638 in words is "one hundred eighteen million, four hundred twenty thousand, six hundred thirty-eight".