256274689 has 8 divisors (see below), whose sum is σ = 280274400. Its totient is φ = 232392000.

The previous prime is 256274687. The next prime is 256274729. The reversal of 256274689 is 986472652.

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 256274689 - 2¹ = 256274687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256274687) 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, 24639 + ... + 33460.

It is an arithmetic number, because the mean of its divisors is an integer number (35034300).

Almost surely, 2^256274689 is an apocalyptic number.

It is an amenable number.

256274689 is a deficient number, since it is larger than the sum of its proper divisors (23999711).

256274689 is a wasteful number, since it uses less digits than its factorization.

256274689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58511.

The product of its digits is 1451520, while the sum is 49.

The square root of 256274689 is about 16008.5817298098. The cubic root of 256274689 is about 635.1874446114.

The spelling of 256274689 in words is "two hundred fifty-six million, two hundred seventy-four thousand, six hundred eighty-nine".