256510982 has 48 divisors (see below), whose sum is σ = 507432240. Its totient is φ = 96126912.

The previous prime is 256510979. The next prime is 256510997. The reversal of 256510982 is 289015652.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 18908 + ... + 29504.

It is an arithmetic number, because the mean of its divisors is an integer number (10571505).

Almost surely, 2^256510982 is an apocalyptic number.

256510982 is a deficient number, since it is larger than the sum of its proper divisors (250921258).

256510982 is a wasteful number, since it uses less digits than its factorization.

256510982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10645 (or 10638 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 256510982 is about 16015.9602272233. The cubic root of 256510982 is about 635.3826053089.

The spelling of 256510982 in words is "two hundred fifty-six million, five hundred ten thousand, nine hundred eighty-two".