555344440 has 128 divisors (see below), whose sum is σ = 1543536000. Its totient is φ = 179128320.

The previous prime is 555344417. The next prime is 555344443. The reversal of 555344440 is 44443555.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 555344396 and 555344405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555344443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 232050 + ... + 234430.

It is an arithmetic number, because the mean of its divisors is an integer number (12058875).

Almost surely, 2^555344440 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 555344440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771768000).

555344440 is an abundant number, since it is smaller than the sum of its proper divisors (988191560).

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

555344440 is a wasteful number, since it uses less digits than its factorization.

555344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 34.

The square root of 555344440 is about 23565.7471767818. The cubic root of 555344440 is about 821.9665471040.

Adding to 555344440 its reverse (44443555), we get a palindrome (599787995).

The spelling of 555344440 in words is "five hundred fifty-five million, three hundred forty-four thousand, four hundred forty".