4004220635 has 4 divisors (see below), whose sum is σ = 4805064768. Its totient is φ = 3203376504.

The previous prime is 4004220593. The next prime is 4004220637. The reversal of 4004220635 is 5360224004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4004220635 - 2²⁰ = 4003172059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4004220637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400422059 + ... + 400422068.

It is an arithmetic number, because the mean of its divisors is an integer number (1201266192).

Almost surely, 2^4004220635 is an apocalyptic number.

4004220635 is a deficient number, since it is larger than the sum of its proper divisors (800844133).

4004220635 is an equidigital number, since it uses as much as digits as its factorization.

4004220635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800844132.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 4004220635 is about 63278.9114555552. The cubic root of 4004220635 is about 1587.9591757477.

Adding to 4004220635 its reverse (5360224004), we get a palindrome (9364444639).

The spelling of 4004220635 in words is "four billion, four million, two hundred twenty thousand, six hundred thirty-five".