256824860 has 24 divisors (see below), whose sum is σ = 540531600. Its totient is φ = 102501504.

The previous prime is 256824847. The next prime is 256824871. The reversal of 256824860 is 68428652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4910 + ... + 23189.

It is an arithmetic number, because the mean of its divisors is an integer number (22522150).

Almost surely, 2^256824860 is an apocalyptic number.

256824860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256824860 is an abundant number, since it is smaller than the sum of its proper divisors (283706740).

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

256824860 is a wasteful number, since it uses less digits than its factorization.

256824860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565 (or 28563 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 256824860 is about 16025.7561444070. The cubic root of 256824860 is about 635.6416602758.

The spelling of 256824860 in words is "two hundred fifty-six million, eight hundred twenty-four thousand, eight hundred sixty".