256967650 has 24 divisors (see below), whose sum is σ = 482200164. Its totient is φ = 101875200.

The previous prime is 256967621. The next prime is 256967651. The reversal of 256967650 is 56769652.

It can be written as a sum of positive squares in 6 ways, for example, as 38809 + 256928841 = 197^2 + 16029^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 256967650.

It is not an unprimeable number, because it can be changed into a prime (256967651) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17091 + ... + 28390.

Almost surely, 2^256967650 is an apocalyptic number.

256967650 is a deficient number, since it is larger than the sum of its proper divisors (225232514).

256967650 is a wasteful number, since it uses less digits than its factorization.

256967650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45606 (or 45601 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 46.

The square root of 256967650 is about 16030.2105413497. The cubic root of 256967650 is about 635.7594402251.

The spelling of 256967650 in words is "two hundred fifty-six million, nine hundred sixty-seven thousand, six hundred fifty".