118438381 has 8 divisors (see below), whose sum is σ = 127713600. Its totient is φ = 109467360.

The previous prime is 118438373. The next prime is 118438391. The reversal of 118438381 is 183834811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118438381 - 2³ = 118438373 is a prime.

It is a super-2 number, since 2×118438381² = 28055300187802322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118438381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118438391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75241 + ... + 76798.

It is an arithmetic number, because the mean of its divisors is an integer number (15964200).

Almost surely, 2^118438381 is an apocalyptic number.

It is an amenable number.

118438381 is a deficient number, since it is larger than the sum of its proper divisors (9275219).

118438381 is a wasteful number, since it uses less digits than its factorization.

118438381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152099.

The product of its digits is 18432, while the sum is 37.

The square root of 118438381 is about 10882.9399061099. The cubic root of 118438381 is about 491.0934639281.

The spelling of 118438381 in words is "one hundred eighteen million, four hundred thirty-eight thousand, three hundred eighty-one".