3981628 has 24 divisors (see below), whose sum is σ = 8150912. Its totient is φ = 1666224.

The previous prime is 3981619. The next prime is 3981629. The reversal of 3981628 is 8261893.

3981628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450 + ... + 2857.

Almost surely, 2^3981628 is an apocalyptic number.

It is an amenable number.

3981628 is an abundant number, since it is smaller than the sum of its proper divisors (4169284).

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

3981628 is a wasteful number, since it uses less digits than its factorization.

3981628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361 (or 3359 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 3981628 is about 1995.4017139413. The cubic root of 3981628 is about 158.4967010628.

The spelling of 3981628 in words is "three million, nine hundred eighty-one thousand, six hundred twenty-eight".