555474840 has 128 divisors (see below), whose sum is σ = 1747146240. Its totient is φ = 141014016.

The previous prime is 555474839. The next prime is 555474853. The reversal of 555474840 is 48474555.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 555474792 and 555474801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 863559 + ... + 864201.

It is an arithmetic number, because the mean of its divisors is an integer number (13649580).

Almost surely, 2^555474840 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 555474840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873573120).

555474840 is an abundant number, since it is smaller than the sum of its proper divisors (1191671400).

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

555474840 is a wasteful number, since it uses less digits than its factorization.

555474840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 448000, while the sum is 42.

The square root of 555474840 is about 23568.5137418548. The cubic root of 555474840 is about 822.0308771797.

The spelling of 555474840 in words is "five hundred fifty-five million, four hundred seventy-four thousand, eight hundred forty".