581226448 has 80 divisors (see below), whose sum is σ = 1257455232. Its totient is φ = 258048000.

The previous prime is 581226431. The next prime is 581226469. The reversal of 581226448 is 844622185.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 581226448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2411608 + ... + 2411848.

Almost surely, 2^581226448 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 581226448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628727616).

581226448 is an abundant number, since it is smaller than the sum of its proper divisors (676228784).

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

581226448 is a wasteful number, since it uses less digits than its factorization.

581226448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524 (or 518 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The square root of 581226448 is about 24108.6384518081. The cubic root of 581226448 is about 834.5424952599.

The spelling of 581226448 in words is "five hundred eighty-one million, two hundred twenty-six thousand, four hundred forty-eight".