3947916 has 48 divisors (see below), whose sum is σ = 10782464. Its totient is φ = 1100736.

The previous prime is 3947903. The next prime is 3947921. The reversal of 3947916 is 6197493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3066 + ... + 4158.

Almost surely, 2^3947916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3947916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5391232).

3947916 is an abundant number, since it is smaller than the sum of its proper divisors (6834548).

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

3947916 is a wasteful number, since it uses less digits than its factorization.

3947916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1148 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 3947916 is about 1986.9363351653. The cubic root of 3947916 is about 158.0481079805.

The spelling of 3947916 in words is "three million, nine hundred forty-seven thousand, nine hundred sixteen".