561796900 has 144 divisors (see below), whose sum is σ = 1451296000. Its totient is φ = 184757760.

The previous prime is 561796853. The next prime is 561796967. The reversal of 561796900 is 9697165.

It is a super-2 number, since 2×561796900² = 631231513699220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2823001 + ... + 2823199.

Almost surely, 2^561796900 is an apocalyptic number.

561796900 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 561796900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725648000).

561796900 is an abundant number, since it is smaller than the sum of its proper divisors (889499100).

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

561796900 is a wasteful number, since it uses less digits than its factorization.

561796900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 561796900 is about 23702.2551669667. The cubic root of 561796900 is about 825.1377302957.

The spelling of 561796900 in words is "five hundred sixty-one million, seven hundred ninety-six thousand, nine hundred".