236505138 has 32 divisors (see below), whose sum is σ = 500193792. Its totient is φ = 74428800.

The previous prime is 236505119. The next prime is 236505149. The reversal of 236505138 is 831505632.

It is a junction number, because it is equal to n+sod(n) for n = 236505099 and 236505108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7881 + ... + 23132.

It is an arithmetic number, because the mean of its divisors is an integer number (15631056).

Almost surely, 2^236505138 is an apocalyptic number.

236505138 is an abundant number, since it is smaller than the sum of its proper divisors (263688654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

236505138 is a wasteful number, since it uses less digits than its factorization.

236505138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31090.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 236505138 is about 15378.7235491116. The cubic root of 236505138 is about 618.4152538485.

The spelling of 236505138 in words is "two hundred thirty-six million, five hundred five thousand, one hundred thirty-eight".