561227400 has 192 divisors, whose sum is σ = 1978891200. Its totient is φ = 146119680.

The previous prime is 561227383. The next prime is 561227413. The reversal of 561227400 is 4722165.

561227400 is a `hidden beast` number, since 5 + 612 + 2 + 7 + 40 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 230992 + ... + 233408.

It is an arithmetic number, because the mean of its divisors is an integer number (10306725).

Almost surely, 2^561227400 is an apocalyptic number.

561227400 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 561227400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (989445600).

561227400 is an abundant number, since it is smaller than the sum of its proper divisors (1417663800).

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

561227400 is a wasteful number, since it uses less digits than its factorization.

561227400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 561227400 is about 23690.2384960557. The cubic root of 561227400 is about 824.8588188164.

Adding to 561227400 its reverse (4722165), we get a palindrome (565949565).

The spelling of 561227400 in words is "five hundred sixty-one million, two hundred twenty-seven thousand, four hundred".