256346434 has 16 divisors (see below), whose sum is σ = 418144248. Its totient is φ = 117372672.

The previous prime is 256346411. The next prime is 256346483. The reversal of 256346434 is 434643652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 252905409 + 3441025 = 15903^2 + 1855^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 256346393 and 256346402.

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 7 ways as a sum of consecutive naturals, for example, 100629 + ... + 103144.

Almost surely, 2^256346434 is an apocalyptic number.

256346434 is a deficient number, since it is larger than the sum of its proper divisors (161797814).

256346434 is a wasteful number, since it uses less digits than its factorization.

256346434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203829.

The product of its digits is 207360, while the sum is 37.

The square root of 256346434 is about 16010.8224023627. The cubic root of 256346434 is about 635.2467134002.

The spelling of 256346434 in words is "two hundred fifty-six million, three hundred forty-six thousand, four hundred thirty-four".