4031022420 has 144 divisors (see below), whose sum is σ = 12649658112. Its totient is φ = 1038343680.

The previous prime is 4031022341. The next prime is 4031022427. The reversal of 4031022420 is 242201304.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 4031022393 and 4031022402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4031022427) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 757489 + ... + 762791.

It is an arithmetic number, because the mean of its divisors is an integer number (87844848).

Almost surely, 2^4031022420 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 4031022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6324829056).

4031022420 is an abundant number, since it is smaller than the sum of its proper divisors (8618635692).

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

4031022420 is a wasteful number, since it uses less digits than its factorization.

4031022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5462 (or 5457 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4031022420 is about 63490.3332799569. Note that the first 3 decimals coincide. The cubic root of 4031022420 is about 1591.4942402631.

Adding to 4031022420 its reverse (242201304), we get a palindrome (4273223724).

The spelling of 4031022420 in words is "four billion, thirty-one million, twenty-two thousand, four hundred twenty".