256784452 has 12 divisors (see below), whose sum is σ = 449485036. Its totient is φ = 128360160.

The previous prime is 256784431. The next prime is 256784467. The reversal of 256784452 is 254487652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 54405376 + 202379076 = 7376^2 + 14226^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 256784399 and 256784408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26818 + ... + 35110.

Almost surely, 2^256784452 is an apocalyptic number.

It is an amenable number.

256784452 is a deficient number, since it is larger than the sum of its proper divisors (192700584).

256784452 is a wasteful number, since it uses less digits than its factorization.

256784452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16038 (or 16036 counting only the distinct ones).

The product of its digits is 537600, while the sum is 43.

The square root of 256784452 is about 16024.4953742700. The cubic root of 256784452 is about 635.6083219204.

The spelling of 256784452 in words is "two hundred fifty-six million, seven hundred eighty-four thousand, four hundred fifty-two".