3921958 has 4 divisors (see below), whose sum is σ = 5882940. Its totient is φ = 1960978.

The previous prime is 3921949. The next prime is 3921959. The reversal of 3921958 is 8591293.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3921959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980488 + ... + 980491.

It is an arithmetic number, because the mean of its divisors is an integer number (1470735).

Almost surely, 2^3921958 is an apocalyptic number.

3921958 is a deficient number, since it is larger than the sum of its proper divisors (1960982).

3921958 is a wasteful number, since it uses less digits than its factorization.

3921958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960981.

The product of its digits is 19440, while the sum is 37.

The square root of 3921958 is about 1980.3933952627. The cubic root of 3921958 is about 157.7009511942.

The spelling of 3921958 in words is "three million, nine hundred twenty-one thousand, nine hundred fifty-eight".