561400000 has 168 divisors, whose sum is σ = 1595335392. Its totient is φ = 192000000.

The previous prime is 561399989. The next prime is 561400033. The reversal of 561400000 is 4165.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1399800 + ... + 1400200.

It is an arithmetic number, because the mean of its divisors is an integer number (9496044).

Almost surely, 2^561400000 is an apocalyptic number.

561400000 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 561400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797667696).

561400000 is an abundant number, since it is smaller than the sum of its proper divisors (1033935392).

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

561400000 is an frugal number, since it uses more digits than its factorization.

561400000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 561400000 is about 23693.8810666383. The cubic root of 561400000 is about 824.9433692380.

Adding to 561400000 its reverse (4165), we get a palindrome (561404165).

The spelling of 561400000 in words is "five hundred sixty-one million, four hundred thousand".