256006280 has 32 divisors (see below), whose sum is σ = 581961240. Its totient is φ = 101345280.

The previous prime is 256006273. The next prime is 256006291. The reversal of 256006280 is 82600652.

It can be written as a sum of positive squares in 4 ways, for example, as 229401316 + 26604964 = 15146^2 + 5158^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29111 + ... + 36870.

Almost surely, 2^256006280 is an apocalyptic number.

256006280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256006280 is an abundant number, since it is smaller than the sum of its proper divisors (325954960).

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

256006280 is a wasteful number, since it uses less digits than its factorization.

256006280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66089 (or 66085 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 256006280 is about 16000.1962487965. The cubic root of 256006280 is about 634.9656128691.

The spelling of 256006280 in words is "two hundred fifty-six million, six thousand, two hundred eighty".