3966620 has 48 divisors (see below), whose sum is σ = 9858240. Its totient is φ = 1311744.

The previous prime is 3966617. The next prime is 3966623. The reversal of 3966620 is 266693.

3966620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3966617) and next prime (3966623).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3572 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (205380).

Almost surely, 2^3966620 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 3966620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4929120).

3966620 is an abundant number, since it is smaller than the sum of its proper divisors (5891620).

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

3966620 is a wasteful number, since it uses less digits than its factorization.

3966620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 3966620 is about 1991.6375172204. The cubic root of 3966620 is about 158.2973091328.

The spelling of 3966620 in words is "three million, nine hundred sixty-six thousand, six hundred twenty".