4000220 has 24 divisors (see below), whose sum is σ = 9600864. Its totient is φ = 1371456.

The previous prime is 4000189. The next prime is 4000237. The reversal of 4000220 is 220004.

It is a junction number, because it is equal to n+sod(n) for n = 4000198 and 4000207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14147 + ... + 14426.

It is an arithmetic number, because the mean of its divisors is an integer number (400036).

Almost surely, 2^4000220 is an apocalyptic number.

It is an amenable number.

4000220 is an abundant number, since it is smaller than the sum of its proper divisors (5600644).

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

4000220 is a wasteful number, since it uses less digits than its factorization.

4000220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28589 (or 28587 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 4000220 is about 2000.0549992438. The cubic root of 4000220 is about 158.7430153787.

Adding to 4000220 its reverse (220004), we get a palindrome (4220224).

The spelling of 4000220 in words is "four million, two hundred twenty", and thus it is an aban number.