256018438 has 24 divisors (see below), whose sum is σ = 430196400. Its totient is φ = 114083424.

The previous prime is 256018417. The next prime is 256018439. The reversal of 256018438 is 834810652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 256018397 and 256018406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256018439) 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, 3258 + ... + 22861.

It is an arithmetic number, because the mean of its divisors is an integer number (17924850).

Almost surely, 2^256018438 is an apocalyptic number.

256018438 is a deficient number, since it is larger than the sum of its proper divisors (174177962).

256018438 is a wasteful number, since it uses less digits than its factorization.

256018438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26176 (or 26163 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 256018438 is about 16000.5761771256. The cubic root of 256018438 is about 634.9756644320.

The spelling of 256018438 in words is "two hundred fifty-six million, eighteen thousand, four hundred thirty-eight".