256471284 has 24 divisors (see below), whose sum is σ = 598838688. Its totient is φ = 85432480.

The previous prime is 256471283. The next prime is 256471301. The reversal of 256471284 is 482174652.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256471283) 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, 13594 + ... + 26414.

It is an arithmetic number, because the mean of its divisors is an integer number (24951612).

Almost surely, 2^256471284 is an apocalyptic number.

It is an amenable number.

256471284 is an abundant number, since it is smaller than the sum of its proper divisors (342367404).

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

256471284 is a wasteful number, since it uses less digits than its factorization.

256471284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14495 (or 14493 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 256471284 is about 16014.7208530152. The cubic root of 256471284 is about 635.3498260496.

The spelling of 256471284 in words is "two hundred fifty-six million, four hundred seventy-one thousand, two hundred eighty-four".