581222880 has 432 divisors, whose sum is σ = 2391348960. Its totient is φ = 125908992.

The previous prime is 581222869. The next prime is 581222891. The reversal of 581222880 is 88222185.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (581222869) and next prime (581222891).

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

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 5332266 + ... + 5332374.

It is an arithmetic number, because the mean of its divisors is an integer number (5535530).

Almost surely, 2^581222880 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 581222880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195674480).

581222880 is an abundant number, since it is smaller than the sum of its proper divisors (1810126080).

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

581222880 is a wasteful number, since it uses less digits than its factorization.

581222880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 581222880 is about 24108.5644533224. The cubic root of 581222880 is about 834.5407875757.

The spelling of 581222880 in words is "five hundred eighty-one million, two hundred twenty-two thousand, eight hundred eighty".