256235994 has 96 divisors (see below), whose sum is σ = 667310400. Its totient is φ = 72666720.

The previous prime is 256235981. The next prime is 256235999. The reversal of 256235994 is 499532652.

256235994 is a `hidden beast` number, since 2 + 56 + 2 + 3 + 599 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (256235999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 473364 + ... + 473904.

It is an arithmetic number, because the mean of its divisors is an integer number (6951150).

Almost surely, 2^256235994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256235994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333655200).

256235994 is an abundant number, since it is smaller than the sum of its proper divisors (411074406).

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

256235994 is a wasteful number, since it uses less digits than its factorization.

256235994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 732 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 256235994 is about 16007.3731136623. The cubic root of 256235994 is about 635.1554739482.

The spelling of 256235994 in words is "two hundred fifty-six million, two hundred thirty-five thousand, nine hundred ninety-four".