256204860 has 24 divisors (see below), whose sum is σ = 717373776. Its totient is φ = 68321280.

The previous prime is 256204853. The next prime is 256204877. The reversal of 256204860 is 68402652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2134981 + ... + 2135100.

It is an arithmetic number, because the mean of its divisors is an integer number (29890574).

Almost surely, 2^256204860 is an apocalyptic number.

256204860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256204860 is an abundant number, since it is smaller than the sum of its proper divisors (461168916).

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

256204860 is a wasteful number, since it uses less digits than its factorization.

256204860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4270093 (or 4270091 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 256204860 is about 16006.4005947621. The cubic root of 256204860 is about 635.1297480133.

The spelling of 256204860 in words is "two hundred fifty-six million, two hundred four thousand, eight hundred sixty".