236791138 has 4 divisors (see below), whose sum is σ = 355186710. Its totient is φ = 118395568.

The previous prime is 236791127. The next prime is 236791151. The reversal of 236791138 is 831197632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 236636689 + 154449 = 15383^2 + 393^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 236791138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59197783 + ... + 59197786.

Almost surely, 2^236791138 is an apocalyptic number.

236791138 is a deficient number, since it is larger than the sum of its proper divisors (118395572).

236791138 is a wasteful number, since it uses less digits than its factorization.

236791138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118395571.

The product of its digits is 54432, while the sum is 40.

The square root of 236791138 is about 15388.0193007417. The cubic root of 236791138 is about 618.6644316865.

The spelling of 236791138 in words is "two hundred thirty-six million, seven hundred ninety-one thousand, one hundred thirty-eight".