3981758 has 24 divisors (see below), whose sum is σ = 6826680. Its totient is φ = 1725360.

The previous prime is 3981749. The next prime is 3981763. The reversal of 3981758 is 8571893.

It is a happy number.

It is an Ulam number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 50363 + ... + 50441.

It is an arithmetic number, because the mean of its divisors is an integer number (284445).

Almost surely, 2^3981758 is an apocalyptic number.

3981758 is a deficient number, since it is larger than the sum of its proper divisors (2844922).

3981758 is a wasteful number, since it uses less digits than its factorization.

3981758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 121 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 3981758 is about 1995.4342885698. The cubic root of 3981758 is about 158.4984260144.

The spelling of 3981758 in words is "three million, nine hundred eighty-one thousand, seven hundred fifty-eight".