256984395 has 16 divisors (see below), whose sum is σ = 414949920. Its totient is φ = 135800064.

The previous prime is 256984381. The next prime is 256984397. The reversal of 256984395 is 593489652.

256984395 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 256984395 - 2⁴ = 256984379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256984397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76954 + ... + 80223.

It is an arithmetic number, because the mean of its divisors is an integer number (25934370).

Almost surely, 2^256984395 is an apocalyptic number.

256984395 is a deficient number, since it is larger than the sum of its proper divisors (157965525).

256984395 is a wasteful number, since it uses less digits than its factorization.

256984395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157294.

The product of its digits is 2332800, while the sum is 51.

The square root of 256984395 is about 16030.7328279153. The cubic root of 256984395 is about 635.7732494349.

The spelling of 256984395 in words is "two hundred fifty-six million, nine hundred eighty-four thousand, three hundred ninety-five".