256436436 has 36 divisors (see below), whose sum is σ = 608427456. Its totient is φ = 84062880.

The previous prime is 256436431. The next prime is 256436441. The reversal of 256436436 is 634634652.

256436436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256436431) and next prime (256436441).

It is a junction number, because it is equal to n+sod(n) for n = 256436394 and 256436403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256436431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41781 + ... + 47523.

Almost surely, 2^256436436 is an apocalyptic number.

It is an amenable number.

256436436 is an abundant number, since it is smaller than the sum of its proper divisors (351991020).

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

256436436 is a wasteful number, since it uses less digits than its factorization.

256436436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872 (or 5809 counting only the distinct ones).

The product of its digits is 311040, while the sum is 39.

The square root of 256436436 is about 16013.6328170718. The cubic root of 256436436 is about 635.3210487232.

The spelling of 256436436 in words is "two hundred fifty-six million, four hundred thirty-six thousand, four hundred thirty-six".