256225388 has 24 divisors (see below), whose sum is σ = 459221952. Its totient is φ = 125034624.

The previous prime is 256225381. The next prime is 256225391. The reversal of 256225388 is 883522652.

256225388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256225381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72920 + ... + 76352.

It is an arithmetic number, because the mean of its divisors is an integer number (19134248).

Almost surely, 2^256225388 is an apocalyptic number.

It is an amenable number.

256225388 is a deficient number, since it is larger than the sum of its proper divisors (202996564).

256225388 is a wasteful number, since it uses less digits than its factorization.

256225388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3879 counting only the distinct ones).

The product of its digits is 230400, while the sum is 41.

The square root of 256225388 is about 16007.0418253967. The cubic root of 256225388 is about 635.1467104749.

It can be divided in two parts, 2562 and 25388, that multiplied together give a palindrome (65044056).

The spelling of 256225388 in words is "two hundred fifty-six million, two hundred twenty-five thousand, three hundred eighty-eight".