256824280 has 32 divisors (see below), whose sum is σ = 579234240. Its totient is φ = 102484480.

The previous prime is 256824277. The next prime is 256824283. The reversal of 256824280 is 82428652.

It is an interprime number because it is at equal distance from previous prime (256824277) and next prime (256824283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256824283) 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, 9792 + ... + 24688.

It is an arithmetic number, because the mean of its divisors is an integer number (18101070).

Almost surely, 2^256824280 is an apocalyptic number.

256824280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256824280 is an abundant number, since it is smaller than the sum of its proper divisors (322409960).

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

256824280 is a wasteful number, since it uses less digits than its factorization.

256824280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15339 (or 15335 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 256824280 is about 16025.7380485268. The cubic root of 256824280 is about 635.6411817754.

The spelling of 256824280 in words is "two hundred fifty-six million, eight hundred twenty-four thousand, two hundred eighty".