256438492308 has 36 divisors (see below), whose sum is σ = 651126356608. Its totient is φ = 85096178640.

The previous prime is 256438492253. The next prime is 256438492327. The reversal of 256438492308 is 803294834652.

256438492308 is a `hidden beast` number, since 2 + 564 + 3 + 8 + 49 + 2 + 30 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15963478 + ... + 15979533.

Almost surely, 2^256438492308 is an apocalyptic number.

It is an amenable number.

256438492308 is an abundant number, since it is smaller than the sum of its proper divisors (394687864300).

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

256438492308 is a wasteful number, since it uses less digits than its factorization.

256438492308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31943244 (or 31943239 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 256438492308 in words is "two hundred fifty-six billion, four hundred thirty-eight million, four hundred ninety-two thousand, three hundred eight".