256031128 has 16 divisors (see below), whose sum is σ = 489116880. Its totient is φ = 125599968.

The previous prime is 256031123. The next prime is 256031131. The reversal of 256031128 is 821130652.

256031128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 256031096 and 256031105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256031123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301500 + ... + 302347.

It is an arithmetic number, because the mean of its divisors is an integer number (30569805).

Almost surely, 2^256031128 is an apocalyptic number.

It is an amenable number.

256031128 is a deficient number, since it is larger than the sum of its proper divisors (233085752).

256031128 is a wasteful number, since it uses less digits than its factorization.

256031128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603906 (or 603902 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 256031128 is about 16000.9727204317. The cubic root of 256031128 is about 634.9861554838.

The spelling of 256031128 in words is "two hundred fifty-six million, thirty-one thousand, one hundred twenty-eight".