3971658 has 32 divisors (see below), whose sum is σ = 8312832. Its totient is φ = 1263600.

The previous prime is 3971651. The next prime is 3971677. The reversal of 3971658 is 8561793.

3971658 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3971651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24285 + ... + 24447.

It is an arithmetic number, because the mean of its divisors is an integer number (259776).

Almost surely, 2^3971658 is an apocalyptic number.

3971658 is an abundant number, since it is smaller than the sum of its proper divisors (4341174).

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

3971658 is a wasteful number, since it uses less digits than its factorization.

3971658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its digits is 45360, while the sum is 39.

The square root of 3971658 is about 1992.9019042592. The cubic root of 3971658 is about 158.3642985298.

The spelling of 3971658 in words is "three million, nine hundred seventy-one thousand, six hundred fifty-eight".