581672720 has 40 divisors (see below), whose sum is σ = 1399028760. Its totient is φ = 224645120.

The previous prime is 581672717. The next prime is 581672789. The reversal of 581672720 is 27276185.

It can be written as a sum of positive squares in 4 ways, for example, as 29986576 + 551686144 = 5476^2 + 23488^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123041 + ... + 127680.

It is an arithmetic number, because the mean of its divisors is an integer number (34975719).

Almost surely, 2^581672720 is an apocalyptic number.

It is an amenable number.

581672720 is an abundant number, since it is smaller than the sum of its proper divisors (817356040).

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

581672720 is a wasteful number, since it uses less digits than its factorization.

581672720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250763 (or 250757 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 581672720 is about 24117.8921135326. The cubic root of 581672720 is about 834.7560308913.

The spelling of 581672720 in words is "five hundred eighty-one million, six hundred seventy-two thousand, seven hundred twenty".