561202840 has 128 divisors (see below), whose sum is σ = 1416683520. Its totient is φ = 200027520.

The previous prime is 561202823. The next prime is 561202843. The reversal of 561202840 is 48202165.

It is a junction number, because it is equal to n+sod(n) for n = 561202799 and 561202808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561202843) 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, 4418857 + ... + 4418983.

It is an arithmetic number, because the mean of its divisors is an integer number (11067840).

Almost surely, 2^561202840 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 561202840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708341760).

561202840 is an abundant number, since it is smaller than the sum of its proper divisors (855480680).

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

561202840 is a wasteful number, since it uses less digits than its factorization.

561202840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 561202840 is about 23689.7201334250. The cubic root of 561202840 is about 824.8467863627.

It can be divided in two parts, 561 and 202840, that added together give a square (203401 = 451²).

The spelling of 561202840 in words is "five hundred sixty-one million, two hundred two thousand, eight hundred forty".