550444440 has 384 divisors, whose sum is σ = 2183328000. Its totient is φ = 109734912.

The previous prime is 550444423. The next prime is 550444457. The reversal of 550444440 is 44444055.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (550444423) and next prime (550444457).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 550444398 and 550444407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1452171 + ... + 1452549.

It is an arithmetic number, because the mean of its divisors is an integer number (5685750).

Almost surely, 2^550444440 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 550444440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091664000).

550444440 is an abundant number, since it is smaller than the sum of its proper divisors (1632883560).

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

550444440 is a wasteful number, since it uses less digits than its factorization.

550444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 550444440 is about 23461.5523783061. The cubic root of 550444440 is about 819.5419015739.

Adding to 550444440 its reverse (44444055), we get a palindrome (594888495).

The spelling of 550444440 in words is "five hundred fifty million, four hundred forty-four thousand, four hundred forty".