555405240 has 128 divisors (see below), whose sum is σ = 1800691200. Its totient is φ = 136235520.

The previous prime is 555405223. The next prime is 555405247. The reversal of 555405240 is 42504555.

555405240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 555405198 and 555405207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555405247) 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, 684435 + ... + 685245.

It is an arithmetic number, because the mean of its divisors is an integer number (14067900).

Almost surely, 2^555405240 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 555405240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900345600).

555405240 is an abundant number, since it is smaller than the sum of its proper divisors (1245285960).

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

555405240 is a wasteful number, since it uses less digits than its factorization.

555405240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 555405240 is about 23567.0371493745. The cubic root of 555405240 is about 821.9965427481.

Adding to 555405240 its reverse (42504555), we get a palindrome (597909795).

The spelling of 555405240 in words is "five hundred fifty-five million, four hundred five thousand, two hundred forty".