3978236 has 6 divisors (see below), whose sum is σ = 6961920. Its totient is φ = 1989116.

The previous prime is 3978229. The next prime is 3978253. The reversal of 3978236 is 6328793.

It is a self number, because there is not a number n which added to its sum of digits gives 3978236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497276 + ... + 497283.

It is an arithmetic number, because the mean of its divisors is an integer number (1160320).

Almost surely, 2^3978236 is an apocalyptic number.

It is an amenable number.

3978236 is a deficient number, since it is larger than the sum of its proper divisors (2983684).

3978236 is a wasteful number, since it uses less digits than its factorization.

3978236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994563 (or 994561 counting only the distinct ones).

The product of its digits is 54432, while the sum is 38.

The square root of 3978236 is about 1994.5515786763. The cubic root of 3978236 is about 158.4516798176.

The spelling of 3978236 in words is "three million, nine hundred seventy-eight thousand, two hundred thirty-six".