581617428 has 48 divisors (see below), whose sum is σ = 1553233920. Its totient is φ = 165934944.

The previous prime is 581617427. The next prime is 581617429. The reversal of 581617428 is 824716185.

It is an interprime number because it is at equal distance from previous prime (581617427) and next prime (581617429).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 581617428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581617427) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 57753 + ... + 67071.

It is an arithmetic number, because the mean of its divisors is an integer number (32359040).

Almost surely, 2^581617428 is an apocalyptic number.

It is an amenable number.

581617428 is an abundant number, since it is smaller than the sum of its proper divisors (971616492).

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

581617428 is a wasteful number, since it uses less digits than its factorization.

581617428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10076 (or 10074 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 581617428 is about 24116.7458003770. The cubic root of 581617428 is about 834.7295802823.

The spelling of 581617428 in words is "five hundred eighty-one million, six hundred seventeen thousand, four hundred twenty-eight".