581861046 has 64 divisors (see below), whose sum is σ = 1315077120. Its totient is φ = 170378880.

The previous prime is 581861011. The next prime is 581861099. The reversal of 581861046 is 640168185.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 581860995 and 581861013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158791 + ... + 162413.

It is an arithmetic number, because the mean of its divisors is an integer number (20548080).

Almost surely, 2^581861046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581861046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (657538560).

581861046 is an abundant number, since it is smaller than the sum of its proper divisors (733216074).

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

581861046 is a wasteful number, since it uses less digits than its factorization.

581861046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 581861046 is about 24121.7960774068. The cubic root of 581861046 is about 834.8461097827.

The spelling of 581861046 in words is "five hundred eighty-one million, eight hundred sixty-one thousand, forty-six".