256134389 has 8 divisors (see below), whose sum is σ = 293130240. Its totient is φ = 219239856.

The previous prime is 256134343. The next prime is 256134401. The reversal of 256134389 is 983431652.

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

It is a cyclic number.

It is not a de Polignac number, because 256134389 - 2¹² = 256130293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256134289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19829 + ... + 30090.

It is an arithmetic number, because the mean of its divisors is an integer number (36641280).

Almost surely, 2^256134389 is an apocalyptic number.

It is an amenable number.

256134389 is a deficient number, since it is larger than the sum of its proper divisors (36995851).

256134389 is an equidigital number, since it uses as much as digits as its factorization.

256134389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50659.

The product of its digits is 155520, while the sum is 41.

The square root of 256134389 is about 16004.1991052349. The cubic root of 256134389 is about 635.0715103296.

The spelling of 256134389 in words is "two hundred fifty-six million, one hundred thirty-four thousand, three hundred eighty-nine".