4002012220 has 24 divisors (see below), whose sum is σ = 8405573904. Its totient is φ = 1600548096.

The previous prime is 4002012169. The next prime is 4002012227. The reversal of 4002012220 is 222102004.

It is a super-2 number, since 2×4002012220² = 32032203618058656800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4002012220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002012227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157524 + ... + 181156.

It is an arithmetic number, because the mean of its divisors is an integer number (350232246).

Almost surely, 2^4002012220 is an apocalyptic number.

It is an amenable number.

4002012220 is an abundant number, since it is smaller than the sum of its proper divisors (4403561684).

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

4002012220 is a wasteful number, since it uses less digits than its factorization.

4002012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32109 (or 32107 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 4002012220 is about 63261.4591991048. The cubic root of 4002012220 is about 1587.6671906911.

Adding to 4002012220 its reverse (222102004), we get a palindrome (4224114224).

The spelling of 4002012220 in words is "four billion, two million, twelve thousand, two hundred twenty".