581740020 has 72 divisors (see below), whose sum is σ = 1777382880. Its totient is φ = 154008000.

The previous prime is 581740013. The next prime is 581740037. The reversal of 581740020 is 20047185.

581740020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13395 + ... + 36645.

Almost surely, 2^581740020 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 581740020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (888691440).

581740020 is an abundant number, since it is smaller than the sum of its proper divisors (1195642860).

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

581740020 is a wasteful number, since it uses less digits than its factorization.

581740020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23405 (or 23400 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 581740020 is about 24119.2873029035. The cubic root of 581740020 is about 834.7882236304.

The spelling of 581740020 in words is "five hundred eighty-one million, seven hundred forty thousand, twenty".