566403840 has 252 divisors, whose sum is σ = 2037491904. Its totient is φ = 150792192.

The previous prime is 566403809. The next prime is 566403847. The reversal of 566403840 is 48304665.

566403840 is a `hidden beast` number, since 5 + 6 + 640 + 3 + 8 + 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 = 566403795 and 566403804.

It is not an unprimeable number, because it can be changed into a prime (566403847) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 932817 + ... + 933423.

Almost surely, 2^566403840 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 566403840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018745952).

566403840 is an abundant number, since it is smaller than the sum of its proper divisors (1471088064).

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

566403840 is an frugal number, since it uses more digits than its factorization.

566403840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 617 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 566403840 is about 23799.2403240103. The cubic root of 566403840 is about 827.3870700178.

The spelling of 566403840 in words is "five hundred sixty-six million, four hundred three thousand, eight hundred forty".