561469440 has 288 divisors, whose sum is σ = 2095133040. Its totient is φ = 127991808.

The previous prime is 561469411. The next prime is 561469459. The reversal of 561469440 is 44964165.

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, 1505094 + ... + 1505466.

Almost surely, 2^561469440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561469440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047566520).

561469440 is an abundant number, since it is smaller than the sum of its proper divisors (1533663600).

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

561469440 is a wasteful number, since it uses less digits than its factorization.

561469440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 390 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 561469440 is about 23695.3463785613. The cubic root of 561469440 is about 824.9773804634.

The spelling of 561469440 in words is "five hundred sixty-one million, four hundred sixty-nine thousand, four hundred forty".