238404136 has 32 divisors (see below), whose sum is σ = 462470400. Its totient is φ = 115096320.

The previous prime is 238404119. The next prime is 238404139. The reversal of 238404136 is 631404832.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 238404098 and 238404107.

It is not an unprimeable number, because it can be changed into a prime (238404139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152736 + ... + 154288.

It is an arithmetic number, because the mean of its divisors is an integer number (14452200).

Almost surely, 2^238404136 is an apocalyptic number.

It is an amenable number.

238404136 is a deficient number, since it is larger than the sum of its proper divisors (224066264).

238404136 is a wasteful number, since it uses less digits than its factorization.

238404136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 238404136 is about 15440.3411879401. The cubic root of 238404136 is about 620.0660144762.

Adding to 238404136 its reverse (631404832), we get a palindrome (869808968).

The spelling of 238404136 in words is "two hundred thirty-eight million, four hundred four thousand, one hundred thirty-six".