555205420 has 96 divisors (see below), whose sum is σ = 1459938816. Its totient is φ = 172300800.

The previous prime is 555205393. The next prime is 555205421. The reversal of 555205420 is 24502555.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (555205421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432099 + ... + 433381.

It is an arithmetic number, because the mean of its divisors is an integer number (15207696).

Almost surely, 2^555205420 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 555205420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729969408).

555205420 is an abundant number, since it is smaller than the sum of its proper divisors (904733396).

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

555205420 is a wasteful number, since it uses less digits than its factorization.

555205420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1589 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 555205420 is about 23562.7973721288. The cubic root of 555205420 is about 821.8979534424.

Adding to 555205420 its reverse (24502555), we get a palindrome (579707975).

The spelling of 555205420 in words is "five hundred fifty-five million, two hundred five thousand, four hundred twenty".