561389450 has 24 divisors (see below), whose sum is σ = 1044810732. Its totient is φ = 224421120.

The previous prime is 561389429. The next prime is 561389459. The reversal of 561389450 is 54983165.

561389450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 176013289 + 385376161 = 13267^2 + 19631^2 .

It is a super-2 number, since 2×561389450² = 630316229142605000, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 561389398 and 561389407.

It is not an unprimeable number, because it can be changed into a prime (561389459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150002 + ... + 153698.

Almost surely, 2^561389450 is an apocalyptic number.

561389450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

561389450 is a deficient number, since it is larger than the sum of its proper divisors (483421282).

561389450 is a wasteful number, since it uses less digits than its factorization.

561389450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6746 (or 6741 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 561389450 is about 23693.6584342731. The cubic root of 561389450 is about 824.9382016765.

The spelling of 561389450 in words is "five hundred sixty-one million, three hundred eighty-nine thousand, four hundred fifty".