236440042 has 4 divisors (see below), whose sum is σ = 354660066. Its totient is φ = 118220020.

The previous prime is 236440021. The next prime is 236440051. The reversal of 236440042 is 240044632.

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., 235591801 + 848241 = 15349^2 + 921^2 .

It is a junction number, because it is equal to n+sod(n) for n = 236439989 and 236440016.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59110009 + ... + 59110012.

Almost surely, 2^236440042 is an apocalyptic number.

236440042 is a deficient number, since it is larger than the sum of its proper divisors (118220024).

236440042 is a wasteful number, since it uses less digits than its factorization.

236440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118220023.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 236440042 is about 15376.6069729313. The cubic root of 236440042 is about 618.3585108200.

Adding to 236440042 its reverse (240044632), we get a palindrome (476484674).

The spelling of 236440042 in words is "two hundred thirty-six million, four hundred forty thousand, forty-two".