256283487 has 8 divisors (see below), whose sum is σ = 379679280. Its totient is φ = 170855640.

The previous prime is 256283473. The next prime is 256283491. The reversal of 256283487 is 784382652.

256283487 is a `hidden beast` number, since 2 + 562 + 8 + 3 + 4 + 87 = 666.

It is not a de Polignac number, because 256283487 - 2⁴ = 256283471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256283437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4745964 + ... + 4746017.

It is an arithmetic number, because the mean of its divisors is an integer number (47459910).

Almost surely, 2^256283487 is an apocalyptic number.

256283487 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

256283487 is a deficient number, since it is larger than the sum of its proper divisors (123395793).

256283487 is an equidigital number, since it uses as much as digits as its factorization.

256283487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491990 (or 9491984 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 256283487 is about 16008.8565175655. The cubic root of 256283487 is about 635.1947132642.

The spelling of 256283487 in words is "two hundred fifty-six million, two hundred eighty-three thousand, four hundred eighty-seven".