573661820 has 48 divisors (see below), whose sum is σ = 1256000256. Its totient is φ = 219840000.

The previous prime is 573661819. The next prime is 573661831. The reversal of 573661820 is 28166375.

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 15 ways as a sum of consecutive naturals, for example, 58040 + ... + 67200.

It is an arithmetic number, because the mean of its divisors is an integer number (26166672).

Almost surely, 2^573661820 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 573661820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628000128).

573661820 is an abundant number, since it is smaller than the sum of its proper divisors (682338436).

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

573661820 is a wasteful number, since it uses less digits than its factorization.

573661820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9302 (or 9300 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 573661820 is about 23951.2383813447. The cubic root of 573661820 is about 830.9061666533.

The spelling of 573661820 in words is "five hundred seventy-three million, six hundred sixty-one thousand, eight hundred twenty".