256478364 has 36 divisors (see below), whose sum is σ = 651596400. Its totient is φ = 85060800.

The previous prime is 256478363. The next prime is 256478393. The reversal of 256478364 is 463874652.

256478364 is a `hidden beast` number, since 2 + 564 + 7 + 83 + 6 + 4 = 666.

256478364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256478363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10737 + ... + 25064.

It is an arithmetic number, because the mean of its divisors is an integer number (18099900).

Almost surely, 2^256478364 is an apocalyptic number.

It is an amenable number.

256478364 is an abundant number, since it is smaller than the sum of its proper divisors (395118036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256478364 is a wasteful number, since it uses less digits than its factorization.

256478364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36010 (or 36005 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 256478364 is about 16014.9418981150. The cubic root of 256478364 is about 635.3556723642.

The spelling of 256478364 in words is "two hundred fifty-six million, four hundred seventy-eight thousand, three hundred sixty-four".