556143840 has 384 divisors, whose sum is σ = 2273080320. Its totient is φ = 124360704.

The previous prime is 556143829. The next prime is 556143877. The reversal of 556143840 is 48341655.

It is a happy number.

556143840 is a `hidden beast` number, since 5 + 5 + 614 + 38 + 4 + 0 = 666.

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 = 556143795 and 556143804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1602547 + ... + 1602893.

It is an arithmetic number, because the mean of its divisors is an integer number (5919480).

Almost surely, 2^556143840 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 556143840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136540160).

556143840 is an abundant number, since it is smaller than the sum of its proper divisors (1716936480).

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

556143840 is a wasteful number, since it uses less digits than its factorization.

556143840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 556143840 is about 23582.7021352516. The cubic root of 556143840 is about 822.3607559233.

The spelling of 556143840 in words is "five hundred fifty-six million, one hundred forty-three thousand, eight hundred forty".