118385931 has 16 divisors (see below), whose sum is σ = 164782080. Its totient is φ = 75514560.

The previous prime is 118385929. The next prime is 118385957. The reversal of 118385931 is 139583811.

It is not a de Polignac number, because 118385931 - 2¹ = 118385929 is a prime.

It is a super-2 number, since 2×118385931² = 28030457317473522, 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 118385931.

It is not an unprimeable number, because it can be changed into a prime (118385431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126 + ... + 15428.

It is an arithmetic number, because the mean of its divisors is an integer number (10298880).

Almost surely, 2^118385931 is an apocalyptic number.

118385931 is a deficient number, since it is larger than the sum of its proper divisors (46396149).

118385931 is a wasteful number, since it uses less digits than its factorization.

118385931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14426.

The product of its digits is 25920, while the sum is 39.

The square root of 118385931 is about 10880.5299043751. The cubic root of 118385931 is about 491.0209602483.

It can be divided in two parts, 118385 and 931, that added together give a triangular number (119316 = T₄₈₈).

The spelling of 118385931 in words is "one hundred eighteen million, three hundred eighty-five thousand, nine hundred thirty-one".