3891996 has 24 divisors (see below), whose sum is σ = 10090640. Its totient is φ = 1297296.

The previous prime is 3891977. The next prime is 3892001. The reversal of 3891996 is 6991983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17911 + ... + 18126.

Almost surely, 2^3891996 is an apocalyptic number.

3891996 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3891996 is an abundant number, since it is smaller than the sum of its proper divisors (6198644).

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

3891996 is a wasteful number, since it uses less digits than its factorization.

3891996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36050 (or 36042 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 3891996 is about 1972.8142335253. The cubic root of 3891996 is about 157.2983360027.

The spelling of 3891996 in words is "three million, eight hundred ninety-one thousand, nine hundred ninety-six".