4004020422 has 48 divisors (see below), whose sum is σ = 8912114640. Its totient is φ = 1298497536.

The previous prime is 4004020409. The next prime is 4004020451. The reversal of 4004020422 is 2240204004.

4004020422 is a `hidden beast` number, since 400 + 40 + 204 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4004020395 and 4004020404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188854 + ... + 208982.

It is an arithmetic number, because the mean of its divisors is an integer number (185669055).

Almost surely, 2^4004020422 is an apocalyptic number.

4004020422 is an abundant number, since it is smaller than the sum of its proper divisors (4908094218).

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

4004020422 is a wasteful number, since it uses less digits than its factorization.

4004020422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20437 (or 20434 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 4004020422 is about 63277.3294474411. The cubic root of 4004020422 is about 1587.9327090602.

Adding to 4004020422 its reverse (2240204004), we get a palindrome (6244224426).

The spelling of 4004020422 in words is "four billion, four million, twenty thousand, four hundred twenty-two".