256444254 has 72 divisors (see below), whose sum is σ = 642980520. Its totient is φ = 73608480.

The previous prime is 256444249. The next prime is 256444277. The reversal of 256444254 is 452444652.

256444254 is a `hidden beast` number, since 2 + 5 + 644 + 4 + 2 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38284 + ... + 44480.

It is an arithmetic number, because the mean of its divisors is an integer number (8930285).

Almost surely, 2^256444254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256444254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321490260).

256444254 is an abundant number, since it is smaller than the sum of its proper divisors (386536266).

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

256444254 is a wasteful number, since it uses less digits than its factorization.

256444254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246 (or 6232 counting only the distinct ones).

The product of its digits is 153600, while the sum is 36.

The square root of 256444254 is about 16013.8769197218. The cubic root of 256444254 is about 635.3275050203.

The spelling of 256444254 in words is "two hundred fifty-six million, four hundred forty-four thousand, two hundred fifty-four".