236421234 has 64 divisors (see below), whose sum is σ = 611815680. Its totient is φ = 66268800.

The previous prime is 236421197. The next prime is 236421257. The reversal of 236421234 is 432124632.

236421234 = 2086² + 2087² + ... + 2138².

236421234 is a `hidden beast` number, since 2 + 3 + 6 + 421 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 236421198 and 236421207.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14134 + ... + 25934.

It is an arithmetic number, because the mean of its divisors is an integer number (9559620).

Almost surely, 2^236421234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 236421234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305907840).

236421234 is an abundant number, since it is smaller than the sum of its proper divisors (375394446).

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

236421234 is a wasteful number, since it uses less digits than its factorization.

236421234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11872 (or 11866 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 236421234 is about 15375.9953824135. The cubic root of 236421234 is about 618.3421142808.

Adding to 236421234 its reverse (432124632), we get a palindrome (668545866).

The spelling of 236421234 in words is "two hundred thirty-six million, four hundred twenty-one thousand, two hundred thirty-four".