581322960 has 80 divisors (see below), whose sum is σ = 2002342080. Its totient is φ = 155018880.

The previous prime is 581322941. The next prime is 581322967. The reversal of 581322960 is 69223185.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581322967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132406 + ... + 136725.

It is an arithmetic number, because the mean of its divisors is an integer number (25029276).

Almost surely, 2^581322960 is an apocalyptic number.

It is an amenable number.

581322960 is an abundant number, since it is smaller than the sum of its proper divisors (1421019120).

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

581322960 is a wasteful number, since it uses less digits than its factorization.

581322960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269153 (or 269141 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 581322960 is about 24110.6399749156. The cubic root of 581322960 is about 834.5886843186.

The spelling of 581322960 in words is "five hundred eighty-one million, three hundred twenty-two thousand, nine hundred sixty".