581581340 has 24 divisors (see below), whose sum is σ = 1223576592. Its totient is φ = 232202880.

The previous prime is 581581309. The next prime is 581581361. The reversal of 581581340 is 43185185.

It is a self number, because there is not a number n which added to its sum of digits gives 581581340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15641 + ... + 37520.

It is an arithmetic number, because the mean of its divisors is an integer number (50982358).

Almost surely, 2^581581340 is an apocalyptic number.

It is an amenable number.

581581340 is an abundant number, since it is smaller than the sum of its proper divisors (641995252).

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

581581340 is a wasteful number, since it uses less digits than its factorization.

581581340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53717 (or 53715 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 581581340 is about 24115.9975949576. The cubic root of 581581340 is about 834.7123155864.

The spelling of 581581340 in words is "five hundred eighty-one million, five hundred eighty-one thousand, three hundred forty".