236428239 has 16 divisors (see below), whose sum is σ = 323430912. Its totient is φ = 153574848.

The previous prime is 236428223. The next prime is 236428249. The reversal of 236428239 is 932824632.

It is not a de Polignac number, because 236428239 - 2⁴ = 236428223 is a prime.

It is a super-2 number, since 2×236428239² = 111796624393282242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 236428197 and 236428206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (236428219) 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, 11674 + ... + 24680.

It is an arithmetic number, because the mean of its divisors is an integer number (20214432).

Almost surely, 2^236428239 is an apocalyptic number.

236428239 is a deficient number, since it is larger than the sum of its proper divisors (87002673).

236428239 is a wasteful number, since it uses less digits than its factorization.

236428239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13166.

The product of its digits is 124416, while the sum is 39.

The square root of 236428239 is about 15376.2231708570. The cubic root of 236428239 is about 618.3482212389.

It can be divided in two parts, 2364 and 28239, that added together give a palindrome (30603).

The spelling of 236428239 in words is "two hundred thirty-six million, four hundred twenty-eight thousand, two hundred thirty-nine".