3980028 has 48 divisors (see below), whose sum is σ = 10336256. Its totient is φ = 1183680.

The previous prime is 3980027. The next prime is 3980051. The reversal of 3980028 is 8200893.

It is a junction number, because it is equal to n+sod(n) for n = 3979977 and 3980004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3980027) 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, 4425 + ... + 5247.

Almost surely, 2^3980028 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 3980028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5168128).

3980028 is an abundant number, since it is smaller than the sum of its proper divisors (6356228).

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

3980028 is a wasteful number, since it uses less digits than its factorization.

3980028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 3980028 is about 1995.0007518796. Note that the first 3 decimals coincide. The cubic root of 3980028 is about 158.4754678137.

The spelling of 3980028 in words is "three million, nine hundred eighty thousand, twenty-eight".