5561800 has 24 divisors (see below), whose sum is σ = 12931650. Its totient is φ = 2224640.

The previous prime is 5561779. The next prime is 5561819. The reversal of 5561800 is 81655.

It can be written as a sum of positive squares in 3 ways, for example, as 4605316 + 956484 = 2146^2 + 978^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13705 + ... + 14104.

Almost surely, 2^5561800 is an apocalyptic number.

5561800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

5561800 is an abundant number, since it is smaller than the sum of its proper divisors (7369850).

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

5561800 is a wasteful number, since it uses less digits than its factorization.

5561800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27825 (or 27816 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 5561800 is about 2358.3468786419. The cubic root of 5561800 is about 177.1760938081.

The spelling of 5561800 in words is "five million, five hundred sixty-one thousand, eight hundred".