233640012 has 12 divisors (see below), whose sum is σ = 545160056. Its totient is φ = 77880000.

The previous prime is 233639983. The next prime is 233640019. The reversal of 233640012 is 210046332.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (233640019) 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 3 ways as a sum of consecutive naturals, for example, 9734989 + ... + 9735012.

Almost surely, 2^233640012 is an apocalyptic number.

It is an amenable number.

233640012 is an abundant number, since it is smaller than the sum of its proper divisors (311520044).

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

233640012 is a wasteful number, since it uses less digits than its factorization.

233640012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19470008 (or 19470006 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 233640012 is about 15285.2874359627. The cubic root of 233640012 is about 615.9078508079.

Adding to 233640012 its reverse (210046332), we get a palindrome (443686344).

The spelling of 233640012 in words is "two hundred thirty-three million, six hundred forty thousand, twelve".