256986435 has 16 divisors (see below), whose sum is σ = 424442880. Its totient is φ = 132637920.

The previous prime is 256986421. The next prime is 256986461. The reversal of 256986435 is 534689652.

256986435 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256986435 - 2⁸ = 256986179 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275865 + ... + 276794.

It is an arithmetic number, because the mean of its divisors is an integer number (26527680).

Almost surely, 2^256986435 is an apocalyptic number.

256986435 is a deficient number, since it is larger than the sum of its proper divisors (167456445).

256986435 is a wasteful number, since it uses less digits than its factorization.

256986435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552698.

The product of its digits is 1555200, while the sum is 48.

The square root of 256986435 is about 16030.7964555726. The cubic root of 256986435 is about 635.7749317342.

The spelling of 256986435 in words is "two hundred fifty-six million, nine hundred eighty-six thousand, four hundred thirty-five".