421008068 has 18 divisors (see below), whose sum is σ = 797799114. Its totient is φ = 194311104.

The previous prime is 421008067. The next prime is 421008139. The reversal of 421008068 is 860800124.

It can be written as a sum of positive squares in 3 ways, for example, as 46895104 + 374112964 = 6848^2 + 19342^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 421008068.

It is not an unprimeable number, because it can be changed into a prime (421008067) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 310721 + ... + 312072.

It is an arithmetic number, because the mean of its divisors is an integer number (44322173).

Almost surely, 2^421008068 is an apocalyptic number.

It is an amenable number.

421008068 is a deficient number, since it is larger than the sum of its proper divisors (376791046).

421008068 is a wasteful number, since it uses less digits than its factorization.

421008068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622823 (or 622808 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 421008068 is about 20518.4811328714. The cubic root of 421008068 is about 749.4859102146.

The spelling of 421008068 in words is "four hundred twenty-one million, eight thousand, sixty-eight".