3981788 has 6 divisors (see below), whose sum is σ = 6968136. Its totient is φ = 1990892.

The previous prime is 3981767. The next prime is 3981821. The reversal of 3981788 is 8871893.

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, 497720 + ... + 497727.

It is an arithmetic number, because the mean of its divisors is an integer number (1161356).

Almost surely, 2^3981788 is an apocalyptic number.

It is an amenable number.

3981788 is a deficient number, since it is larger than the sum of its proper divisors (2986348).

3981788 is a wasteful number, since it uses less digits than its factorization.

3981788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995451 (or 995449 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 3981788 is about 1995.4418057162. The cubic root of 3981788 is about 158.4988240748.

The spelling of 3981788 in words is "three million, nine hundred eighty-one thousand, seven hundred eighty-eight".