581480940 has 192 divisors, whose sum is σ = 1820528640. Its totient is φ = 137998080.

The previous prime is 581480923. The next prime is 581480947. The reversal of 581480940 is 49084185.

It is not an unprimeable number, because it can be changed into a prime (581480947) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1756575 + ... + 1756905.

It is an arithmetic number, because the mean of its divisors is an integer number (9481920).

Almost surely, 2^581480940 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 581480940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (910264320).

581480940 is an abundant number, since it is smaller than the sum of its proper divisors (1239047700).

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

581480940 is a wasteful number, since it uses less digits than its factorization.

581480940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 450 counting only the distinct ones).

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

The square root of 581480940 is about 24113.9158993308. The cubic root of 581480940 is about 834.6642799213.

The spelling of 581480940 in words is "five hundred eighty-one million, four hundred eighty thousand, nine hundred forty".