4002220424 has 8 divisors (see below), whose sum is σ = 7504163310. Its totient is φ = 2001110208.

The previous prime is 4002220379. The next prime is 4002220433. The reversal of 4002220424 is 4240222004.

It can be written as a sum of positive squares in only one way, i.e., 2142023524 + 1860196900 = 46282^2 + 43130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 4002220396 and 4002220405.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250138769 + ... + 250138784.

Almost surely, 2^4002220424 is an apocalyptic number.

It is an amenable number.

4002220424 is a deficient number, since it is larger than the sum of its proper divisors (3501942886).

4002220424 is a wasteful number, since it uses less digits than its factorization.

4002220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500277559 (or 500277555 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 4002220424 is about 63263.1047609900. The cubic root of 4002220424 is about 1587.6947229182.

Adding to 4002220424 its reverse (4240222004), we get a palindrome (8242442428).

The spelling of 4002220424 in words is "four billion, two million, two hundred twenty thousand, four hundred twenty-four".