3964842 has 64 divisors (see below), whose sum is σ = 10679040. Its totient is φ = 1064448.

The previous prime is 3964841. The next prime is 3964843. The reversal of 3964842 is 2484693.

It is a happy number.

3964842 is a `hidden beast` number, since 3 + 9 + 648 + 4 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (3964841) and next prime (3964843).

It is a junction number, because it is equal to n+sod(n) for n = 3964797 and 3964806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3964841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6118 + ... + 6734.

It is an arithmetic number, because the mean of its divisors is an integer number (166860).

Almost surely, 2^3964842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3964842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5339520).

3964842 is an abundant number, since it is smaller than the sum of its proper divisors (6714198).

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

3964842 is a wasteful number, since it uses less digits than its factorization.

3964842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 646 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 3964842 is about 1991.1911008238. The cubic root of 3964842 is about 158.2736538394.

The spelling of 3964842 in words is "three million, nine hundred sixty-four thousand, eight hundred forty-two".