256896447 has 8 divisors (see below), whose sum is σ = 350883120. Its totient is φ = 167087040.

The previous prime is 256896391. The next prime is 256896461. The reversal of 256896447 is 744698652.

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

It is not a de Polignac number, because 256896447 - 2⁶ = 256896383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256896447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256896487) 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, 1044172 + ... + 1044417.

It is an arithmetic number, because the mean of its divisors is an integer number (43860390).

Almost surely, 2^256896447 is an apocalyptic number.

256896447 is a deficient number, since it is larger than the sum of its proper divisors (93986673).

256896447 is a wasteful number, since it uses less digits than its factorization.

256896447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088633.

The product of its digits is 2903040, while the sum is 51.

The square root of 256896447 is about 16027.9894871440. The cubic root of 256896447 is about 635.7007140765.

It can be divided in two parts, 2568 and 96447, that multiplied together give a triangular number (247675896 = T₂₂₂₅₆).

The spelling of 256896447 in words is "two hundred fifty-six million, eight hundred ninety-six thousand, four hundred forty-seven".