256274540 has 24 divisors (see below), whose sum is σ = 538477632. Its totient is φ = 102452480.

The previous prime is 256274519. The next prime is 256274549. The reversal of 256274540 is 45472652.

256274540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256274540.

It is not an unprimeable number, because it can be changed into a prime (256274549) 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, 66260 + ... + 70020.

It is an arithmetic number, because the mean of its divisors is an integer number (22436568).

Almost surely, 2^256274540 is an apocalyptic number.

256274540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256274540 is an abundant number, since it is smaller than the sum of its proper divisors (282203092).

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

256274540 is a wasteful number, since it uses less digits than its factorization.

256274540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7177 (or 7175 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 256274540 is about 16008.5770760552. The cubic root of 256274540 is about 635.1873215105.

The spelling of 256274540 in words is "two hundred fifty-six million, two hundred seventy-four thousand, five hundred forty".