573661000 has 128 divisors (see below), whose sum is σ = 1479928320. Its totient is φ = 208120000.

The previous prime is 573660973. The next prime is 573661001. The reversal of 573661000 is 166375.

It is a self number, because there is not a number n which added to its sum of digits gives 573661000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (573661001) 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 31 ways as a sum of consecutive naturals, for example, 1330785 + ... + 1331215.

It is an arithmetic number, because the mean of its divisors is an integer number (11561940).

Almost surely, 2^573661000 is an apocalyptic number.

573661000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 573661000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739964160).

573661000 is an abundant number, since it is smaller than the sum of its proper divisors (906267320).

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

573661000 is a wasteful number, since it uses less digits than its factorization.

573661000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 573661000 is about 23951.2212632258. The cubic root of 573661000 is about 830.9057707502.

The spelling of 573661000 in words is "five hundred seventy-three million, six hundred sixty-one thousand".