581648 has 10 divisors (see below), whose sum is σ = 1126974. Its totient is φ = 290816.

The previous prime is 581639. The next prime is 581657. The reversal of 581648 is 846185.

It is an interprime number because it is at equal distance from previous prime (581639) and next prime (581657).

It can be written as a sum of positive squares in only one way, i.e., 446224 + 135424 = 668^2 + 368^2 .

It is an Ulam number.

It is an unprimeable number.

581648 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18161 + ... + 18192.

2⁵⁸¹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

581648 is a deficient number, since it is larger than the sum of its proper divisors (545326).

581648 is a wasteful number, since it uses less digits than its factorization.

581648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36361 (or 36355 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 581648 is about 762.6585081149. The cubic root of 581648 is about 83.4744205535.

The spelling of 581648 in words is "five hundred eighty-one thousand, six hundred forty-eight".