555009840 has 640 divisors, whose sum is σ = 2468413440. Its totient is φ = 111283200.

The previous prime is 555009827. The next prime is 555009841. The reversal of 555009840 is 48900555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 555009795 and 555009804.

It is not an unprimeable number, because it can be changed into a prime (555009841) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 7817005 + ... + 7817075.

It is an arithmetic number, because the mean of its divisors is an integer number (3856896).

Almost surely, 2^555009840 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 555009840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234206720).

555009840 is an abundant number, since it is smaller than the sum of its proper divisors (1913403600).

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

555009840 is a wasteful number, since it uses less digits than its factorization.

555009840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 555009840 is about 23558.6468202229. The cubic root of 555009840 is about 821.8014332027.

The spelling of 555009840 in words is "five hundred fifty-five million, nine thousand, eight hundred forty".