4005420534 has 48 divisors (see below), whose sum is σ = 9045464064. Its totient is φ = 1279508400.

The previous prime is 4005420527. The next prime is 4005420539. The reversal of 4005420534 is 4350245004.

4005420534 is a `hidden beast` number, since 400 + 54 + 205 + 3 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 4005420498 and 4005420507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4005420539) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22629 + ... + 92319.

It is an arithmetic number, because the mean of its divisors is an integer number (188447168).

Almost surely, 2^4005420534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4005420534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4522732032).

4005420534 is an abundant number, since it is smaller than the sum of its proper divisors (5040043530).

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

4005420534 is a wasteful number, since it uses less digits than its factorization.

4005420534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69833 (or 69830 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 4005420534 is about 63288.3917792197. The cubic root of 4005420534 is about 1588.1177750949.

Adding to 4005420534 its reverse (4350245004), we get a palindrome (8355665538).

The spelling of 4005420534 in words is "four billion, five million, four hundred twenty thousand, five hundred thirty-four".