256433136 has 40 divisors (see below), whose sum is σ = 663030480. Its totient is φ = 85403136.

The previous prime is 256433087. The next prime is 256433143. The reversal of 256433136 is 631334652.

It is a junction number, because it is equal to n+sod(n) for n = 256433097 and 256433106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96076 + ... + 98708.

It is an arithmetic number, because the mean of its divisors is an integer number (16575762).

Almost surely, 2^256433136 is an apocalyptic number.

It is an amenable number.

256433136 is an abundant number, since it is smaller than the sum of its proper divisors (406597344).

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

256433136 is a wasteful number, since it uses less digits than its factorization.

256433136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673 (or 4667 counting only the distinct ones).

The product of its digits is 38880, while the sum is 33.

The square root of 256433136 is about 16013.5297795333. The cubic root of 256433136 is about 635.3183234624.

Adding to 256433136 its reverse (631334652), we get a palindrome (887767788).

The spelling of 256433136 in words is "two hundred fifty-six million, four hundred thirty-three thousand, one hundred thirty-six".