118238391 has 12 divisors (see below), whose sum is σ = 171557568. Its totient is φ = 78470784.

The previous prime is 118238381. The next prime is 118238399. The reversal of 118238391 is 193832811.

It is not a de Polignac number, because 118238391 - 2¹³ = 118230199 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118238399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27450 + ... + 31463.

It is an arithmetic number, because the mean of its divisors is an integer number (14296464).

Almost surely, 2^118238391 is an apocalyptic number.

118238391 is a deficient number, since it is larger than the sum of its proper divisors (53319177).

118238391 is a wasteful number, since it uses less digits than its factorization.

118238391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59142 (or 59139 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 118238391 is about 10873.7477899756. The cubic root of 118238391 is about 490.8168950411.

The spelling of 118238391 in words is "one hundred eighteen million, two hundred thirty-eight thousand, three hundred ninety-one".