581473280 has 66 divisors (see below), whose sum is σ = 1399005774. Its totient is φ = 231899136.

The previous prime is 581473247. The next prime is 581473297. The reversal of 581473280 is 82374185.

It can be written as a sum of positive squares in 3 ways, for example, as 3936256 + 577537024 = 1984^2 + 24032^2 .

It is a super-2 number, since 2×581473280² = 676222350707916800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1725272 + ... + 1725608.

Almost surely, 2^581473280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581473280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699502887).

581473280 is an abundant number, since it is smaller than the sum of its proper divisors (817532494).

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

581473280 is an frugal number, since it uses more digits than its factorization.

581473280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 581473280 is about 24113.7570693577. The cubic root of 581473280 is about 834.6606148218.

The spelling of 581473280 in words is "five hundred eighty-one million, four hundred seventy-three thousand, two hundred eighty".