581338887 has 8 divisors (see below), whose sum is σ = 793144704. Its totient is φ = 378546168.

The previous prime is 581338873. The next prime is 581338897. The reversal of 581338887 is 788833185.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 581338887 - 2⁷ = 581338759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581338867) by changing a digit.

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, 2253123 + ... + 2253380.

It is an arithmetic number, because the mean of its divisors is an integer number (99143088).

Almost surely, 2^581338887 is an apocalyptic number.

581338887 is a deficient number, since it is larger than the sum of its proper divisors (211805817).

581338887 is a wasteful number, since it uses less digits than its factorization.

581338887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506549.

The product of its digits is 1290240, while the sum is 51.

The square root of 581338887 is about 24110.9702625174. The cubic root of 581338887 is about 834.5963062279.

The spelling of 581338887 in words is "five hundred eighty-one million, three hundred thirty-eight thousand, eight hundred eighty-seven".