256243896 has 24 divisors (see below), whose sum is σ = 693994080. Its totient is φ = 85414608.

The previous prime is 256243853. The next prime is 256243927. The reversal of 256243896 is 698342652.

256243896 is a `hidden beast` number, since 2 + 562 + 4 + 3 + 89 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1779400 + ... + 1779543.

It is an arithmetic number, because the mean of its divisors is an integer number (28916420).

Almost surely, 2^256243896 is an apocalyptic number.

It is an amenable number.

256243896 is an abundant number, since it is smaller than the sum of its proper divisors (437750184).

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

256243896 is a wasteful number, since it uses less digits than its factorization.

256243896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3558955 (or 3558948 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 256243896 is about 16007.6199355182. The cubic root of 256243896 is about 635.1620030166.

The spelling of 256243896 in words is "two hundred fifty-six million, two hundred forty-three thousand, eight hundred ninety-six".