581240328 has 64 divisors (see below), whose sum is σ = 1503705600. Its totient is φ = 187031040.

The previous prime is 581240321. The next prime is 581240333. The reversal of 581240328 is 823042185.

It is not an unprimeable number, because it can be changed into a prime (581240321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422650 + ... + 424022.

It is an arithmetic number, because the mean of its divisors is an integer number (23495400).

Almost surely, 2^581240328 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 581240328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (751852800).

581240328 is an abundant number, since it is smaller than the sum of its proper divisors (922465272).

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

581240328 is a wasteful number, since it uses less digits than its factorization.

581240328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 581240328 is about 24108.9263137121. The cubic root of 581240328 is about 834.5491383148.

The spelling of 581240328 in words is "five hundred eighty-one million, two hundred forty thousand, three hundred twenty-eight".