3946645 has 12 divisors (see below), whose sum is σ = 4844196. Its totient is φ = 3086720.

The previous prime is 3946643. The next prime is 3946673. The reversal of 3946645 is 5466493.

It is a happy number.

3946645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3946645 is a nontrivial binomial coefficient, being equal to C(2810, 2).

It can be written as a sum of positive squares in 6 ways, for example, as 237169 + 3709476 = 487^2 + 1926^2 .

It is not a de Polignac number, because 3946645 - 2¹ = 3946643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946643) 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 11 ways as a sum of consecutive naturals, for example, 13905 + ... + 14185.

It is an arithmetic number, because the mean of its divisors is an integer number (403683).

Almost surely, 2^3946645 is an apocalyptic number.

3946645 is the 2809-th triangular number and also the 1405-th hexagonal number.

3946645 is the 937-th centered nonagonal number.

It is an amenable number.

3946645 is a deficient number, since it is larger than the sum of its proper divisors (897551).

3946645 is an equidigital number, since it uses as much as digits as its factorization.

3946645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392 (or 339 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 3946645 is about 1986.6164702831. The cubic root of 3946645 is about 158.0311453850.

The spelling of 3946645 in words is "three million, nine hundred forty-six thousand, six hundred forty-five".