3891964 has 6 divisors (see below), whose sum is σ = 6810944. Its totient is φ = 1945980.

The previous prime is 3891917. The next prime is 3891971. The reversal of 3891964 is 4691983.

It is an Ulam number.

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, 486492 + ... + 486499.

Almost surely, 2^3891964 is an apocalyptic number.

It is an amenable number.

3891964 is a deficient number, since it is larger than the sum of its proper divisors (2918980).

3891964 is a wasteful number, since it uses less digits than its factorization.

3891964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972995 (or 972993 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 3891964 is about 1972.8061232671. The cubic root of 3891964 is about 157.2979048990.

It can be divided in two parts, 38919 and 64, that added together give a palindrome (38983).

The spelling of 3891964 in words is "three million, eight hundred ninety-one thousand, nine hundred sixty-four".