256210478 has 16 divisors (see below), whose sum is σ = 422133120. Its totient is φ = 116085816.

The previous prime is 256210463. The next prime is 256210511. The reversal of 256210478 is 874012652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145700 + ... + 147447.

It is an arithmetic number, because the mean of its divisors is an integer number (26383320).

Almost surely, 2^256210478 is an apocalyptic number.

256210478 is a deficient number, since it is larger than the sum of its proper divisors (165922642).

256210478 is a wasteful number, since it uses less digits than its factorization.

256210478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293191.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 256210478 is about 16006.5760860966. The cubic root of 256210478 is about 635.1343903047.

The spelling of 256210478 in words is "two hundred fifty-six million, two hundred ten thousand, four hundred seventy-eight".