3917646 has 28 divisors (see below), whose sum is σ = 8813952. Its totient is φ = 1305396.

The previous prime is 3917623. The next prime is 3917681. The reversal of 3917646 is 6467193.

3917646 is a `hidden beast` number, since 3 + 9 + 1 + 7 + 646 = 666.

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 3917646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 115 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (314784).

Almost surely, 2^3917646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3917646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4406976).

3917646 is an abundant number, since it is smaller than the sum of its proper divisors (4896306).

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

3917646 is an equidigital number, since it uses as much as digits as its factorization.

3917646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707 (or 2692 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 3917646 is about 1979.3044232760. The cubic root of 3917646 is about 157.6431351862.

The spelling of 3917646 in words is "three million, nine hundred seventeen thousand, six hundred forty-six".