581223668 has 12 divisors (see below), whose sum is σ = 1018788960. Its totient is φ = 290141112.

The previous prime is 581223637. The next prime is 581223689. The reversal of 581223668 is 866322185.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 114896 + ... + 119847.

It is an arithmetic number, because the mean of its divisors is an integer number (84899080).

Almost surely, 2^581223668 is an apocalyptic number.

It is an amenable number.

581223668 is a deficient number, since it is larger than the sum of its proper divisors (437565292).

581223668 is a wasteful number, since it uses less digits than its factorization.

581223668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235366 (or 235364 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 581223668 is about 24108.5807960568. The cubic root of 581223668 is about 834.5411647218.

The spelling of 581223668 in words is "five hundred eighty-one million, two hundred twenty-three thousand, six hundred sixty-eight".