236405142 has 40 divisors (see below), whose sum is σ = 542057736. Its totient is φ = 76966848.

The previous prime is 236405137. The next prime is 236405161. The reversal of 236405142 is 241504632.

236405142 is a `hidden beast` number, since 2 + 3 + 640 + 5 + 14 + 2 = 666.

It is a super-3 number, since 3×236405142³ (a number of 26 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 10003 + ... + 23934.

Almost surely, 2^236405142 is an apocalyptic number.

236405142 is an abundant number, since it is smaller than the sum of its proper divisors (305652594).

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

236405142 is a wasteful number, since it uses less digits than its factorization.

236405142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33994 (or 33985 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 236405142 is about 15375.4720903132. The cubic root of 236405142 is about 618.3280848203.

Adding to 236405142 its reverse (241504632), we get a palindrome (477909774).

It can be divided in two parts, 23640 and 5142, that added together give a palindrome (28782).

The spelling of 236405142 in words is "two hundred thirty-six million, four hundred five thousand, one hundred forty-two".