4000042220 has 48 divisors (see below), whose sum is σ = 8690976000. Its totient is φ = 1544847360.

The previous prime is 4000042187. The next prime is 4000042231. The reversal of 4000042220 is 222400004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4000042195 and 4000042204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271196 + ... + 285564.

It is an arithmetic number, because the mean of its divisors is an integer number (181062000).

Almost surely, 2^4000042220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4000042220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4345488000).

4000042220 is an abundant number, since it is smaller than the sum of its proper divisors (4690933780).

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

4000042220 is a wasteful number, since it uses less digits than its factorization.

4000042220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14858 (or 14856 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 4000042220 is about 63245.8869808939. The cubic root of 4000042220 is about 1587.4066369546.

Adding to 4000042220 its reverse (222400004), we get a palindrome (4222442224).

The spelling of 4000042220 in words is "four billion, forty-two thousand, two hundred twenty".