4020020 has 48 divisors (see below), whose sum is σ = 9072000. Its totient is φ = 1491840.

The previous prime is 4020017. The next prime is 4020031. The reversal of 4020020 is 200204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26906 + ... + 27054.

It is an arithmetic number, because the mean of its divisors is an integer number (189000).

Almost surely, 2^4020020 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 4020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4536000).

4020020 is an abundant number, since it is smaller than the sum of its proper divisors (5051980).

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

4020020 is a wasteful number, since it uses less digits than its factorization.

4020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 246 counting only the distinct ones).

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

The square root of 4020020 is about 2004.9987531168. The cubic root of 4020020 is about 159.0044960030.

Adding to 4020020 its reverse (200204), we get a palindrome (4220224).

The spelling of 4020020 in words is "four million, twenty thousand, twenty".