561810288 has 160 divisors (see below), whose sum is σ = 1669393152. Its totient is φ = 161280000.

The previous prime is 561810287. The next prime is 561810329. The reversal of 561810288 is 882018165.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561810287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2238163 + ... + 2238413.

Almost surely, 2^561810288 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 561810288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834696576).

561810288 is an abundant number, since it is smaller than the sum of its proper divisors (1107582864).

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

561810288 is a wasteful number, since it uses less digits than its factorization.

561810288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 561810288 is about 23702.5375856679. The cubic root of 561810288 is about 825.1442847737.

The spelling of 561810288 in words is "five hundred sixty-one million, eight hundred ten thousand, two hundred eighty-eight".