4031220 has 24 divisors (see below), whose sum is σ = 11287584. Its totient is φ = 1074976.

The previous prime is 4031219. The next prime is 4031221. The reversal of 4031220 is 221304.

It is an interprime number because it is at equal distance from previous prime (4031219) and next prime (4031221).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 4031196 and 4031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031221) 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, 33534 + ... + 33653.

It is an arithmetic number, because the mean of its divisors is an integer number (470316).

Almost surely, 2^4031220 is an apocalyptic number.

It is an amenable number.

4031220 is an abundant number, since it is smaller than the sum of its proper divisors (7256364).

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

4031220 is a wasteful number, since it uses less digits than its factorization.

4031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67199 (or 67197 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 4031220 is about 2007.7898296386. The cubic root of 4031220 is about 159.1520242127.

Adding to 4031220 its reverse (221304), we get a palindrome (4252524).

The spelling of 4031220 in words is "four million, thirty-one thousand, two hundred twenty".