3997028 has 18 divisors (see below), whose sum is σ = 8137206. Its totient is φ = 1712928.

The previous prime is 3997003. The next prime is 3997039. The reversal of 3997028 is 8207993.

It can be written as a sum of positive squares in only one way, i.e., 3467044 + 529984 = 1862^2 + 728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3996982 and 3997000.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10001 + ... + 10392.

It is an arithmetic number, because the mean of its divisors is an integer number (452067).

Almost surely, 2^3997028 is an apocalyptic number.

It is an amenable number.

3997028 is an abundant number, since it is smaller than the sum of its proper divisors (4140178).

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

3997028 is a wasteful number, since it uses less digits than its factorization.

3997028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20411 (or 20402 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 3997028 is about 1999.2568619365. The cubic root of 3997028 is about 158.7007808232.

The spelling of 3997028 in words is "three million, nine hundred ninety-seven thousand, twenty-eight".