3971958 has 8 divisors (see below), whose sum is σ = 7943928. Its totient is φ = 1323984.

The previous prime is 3971917. The next prime is 3971963. The reversal of 3971958 is 8591793.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

3971958 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330991 + ... + 331002.

It is an arithmetic number, because the mean of its divisors is an integer number (992991).

Almost surely, 2^3971958 is an apocalyptic number.

3971958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3971958 is a wasteful number, since it uses less digits than its factorization.

3971958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661998.

The product of its digits is 68040, while the sum is 42.

The square root of 3971958 is about 1992.9771699646. The cubic root of 3971958 is about 158.3682857893.

The spelling of 3971958 in words is "three million, nine hundred seventy-one thousand, nine hundred fifty-eight".