3971828 has 12 divisors (see below), whose sum is σ = 7943712. Its totient is φ = 1702200.

The previous prime is 3971809. The next prime is 3971833. The reversal of 3971828 is 8281793.

3971828 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 3971791 and 3971800.

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 3 ways as a sum of consecutive naturals, for example, 70898 + ... + 70953.

It is an arithmetic number, because the mean of its divisors is an integer number (661976).

Almost surely, 2^3971828 is an apocalyptic number.

It is an amenable number.

3971828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3971828 is a wasteful number, since it uses less digits than its factorization.

3971828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141862 (or 141860 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 3971828 is about 1992.9445551746. The cubic root of 3971828 is about 158.3665580015.

The spelling of 3971828 in words is "three million, nine hundred seventy-one thousand, eight hundred twenty-eight".