118989638 has 4 divisors (see below), whose sum is σ = 178484460. Its totient is φ = 59494818.

The previous prime is 118989631. The next prime is 118989641. The reversal of 118989638 is 836989811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836989811 = 7 ⋅119569973.

It is a self number, because there is not a number n which added to its sum of digits gives 118989638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118989631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29747408 + ... + 29747411.

It is an arithmetic number, because the mean of its divisors is an integer number (44621115).

Almost surely, 2^118989638 is an apocalyptic number.

118989638 is a deficient number, since it is larger than the sum of its proper divisors (59494822).

118989638 is an equidigital number, since it uses as much as digits as its factorization.

118989638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59494821.

The product of its digits is 746496, while the sum is 53.

The square root of 118989638 is about 10908.2371628050. The cubic root of 118989638 is about 491.8541964457.

The spelling of 118989638 in words is "one hundred eighteen million, nine hundred eighty-nine thousand, six hundred thirty-eight".