564421980 has 96 divisors (see below), whose sum is σ = 1682553600. Its totient is φ = 140963328.

The previous prime is 564421973. The next prime is 564421993. The reversal of 564421980 is 89124465.

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 31 ways as a sum of consecutive naturals, for example, 98679 + ... + 104241.

It is an arithmetic number, because the mean of its divisors is an integer number (17526600).

Almost surely, 2^564421980 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 564421980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841276800).

564421980 is an abundant number, since it is smaller than the sum of its proper divisors (1118131620).

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

564421980 is a wasteful number, since it uses less digits than its factorization.

564421980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5681 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 564421980 is about 23757.5667946025. The cubic root of 564421980 is about 826.4209268560.

The spelling of 564421980 in words is "five hundred sixty-four million, four hundred twenty-one thousand, nine hundred eighty".