256335136 has 24 divisors (see below), whose sum is σ = 514185084. Its totient is φ = 125748480.

The previous prime is 256335119. The next prime is 256335151. The reversal of 256335136 is 631533652.

256335136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 223203600 + 33131536 = 14940^2 + 5756^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73875 + ... + 77266.

Almost surely, 2^256335136 is an apocalyptic number.

It is an amenable number.

256335136 is an abundant number, since it is smaller than the sum of its proper divisors (257849948).

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

256335136 is a wasteful number, since it uses less digits than its factorization.

256335136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151204 (or 151196 counting only the distinct ones).

The product of its digits is 48600, while the sum is 34.

The square root of 256335136 is about 16010.4695746252. The cubic root of 256335136 is about 635.2373808176.

Adding to 256335136 its reverse (631533652), we get a palindrome (887868788).

The spelling of 256335136 in words is "two hundred fifty-six million, three hundred thirty-five thousand, one hundred thirty-six".