256384694 has 8 divisors (see below), whose sum is σ = 396982848. Its totient is φ = 124057080.

The previous prime is 256384693. The next prime is 256384697. The reversal of 256384694 is 496483652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×256384694² = 131466222634947272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256384693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067557 + ... + 2067680.

It is an arithmetic number, because the mean of its divisors is an integer number (49622856).

Almost surely, 2^256384694 is an apocalyptic number.

256384694 is a deficient number, since it is larger than the sum of its proper divisors (140598154).

256384694 is a wasteful number, since it uses less digits than its factorization.

256384694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135270.

The product of its digits is 1244160, while the sum is 47.

The square root of 256384694 is about 16012.0171746098. The cubic root of 256384694 is about 635.2783155955.

The spelling of 256384694 in words is "two hundred fifty-six million, three hundred eighty-four thousand, six hundred ninety-four".