4080020 has 48 divisors (see below), whose sum is σ = 9907968. Its totient is φ = 1382400.

The previous prime is 4080007. The next prime is 4080029. The reversal of 4080020 is 200804.

4080020 = T₁₂₇₅ + T₁₂₇₆ + ... + T₁₂₇₉.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 4079977 and 4080004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4080029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21044 + ... + 21236.

It is an arithmetic number, because the mean of its divisors is an integer number (206416).

Almost surely, 2^4080020 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 4080020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4953984).

4080020 is an abundant number, since it is smaller than the sum of its proper divisors (5827948).

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

4080020 is a wasteful number, since it uses less digits than its factorization.

4080020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 4080020 is about 2019.9059384041. The cubic root of 4080020 is about 159.7916559057.

Adding to 4080020 its reverse (200804), we get a palindrome (4280824).

The spelling of 4080020 in words is "four million, eighty thousand, twenty".