236138842 has 12 divisors (see below), whose sum is σ = 366005898. Its totient is φ = 114259800.

The previous prime is 236138813. The next prime is 236138849. The reversal of 236138842 is 248831632.

It can be written as a sum of positive squares in only one way, i.e., 130850721 + 105288121 = 11439^2 + 10261^2 .

It is a super-2 number, since 2×236138842² = 111523105402201928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (236138849) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 59509 + ... + 63352.

Almost surely, 2^236138842 is an apocalyptic number.

236138842 is a deficient number, since it is larger than the sum of its proper divisors (129867056).

236138842 is a wasteful number, since it uses less digits than its factorization.

236138842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122925 (or 122894 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 236138842 is about 15366.8097534915. The cubic root of 236138842 is about 618.0958244529.

The spelling of 236138842 in words is "two hundred thirty-six million, one hundred thirty-eight thousand, eight hundred forty-two".