3946644 has 60 divisors (see below), whose sum is σ = 11122804. Its totient is φ = 1213056.

The previous prime is 3946643. The next prime is 3946673. The reversal of 3946644 is 4466493.

3946644 is a `hidden beast` number, since 3 + 9 + 4 + 6 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 3572100 = 612^2 + 1890^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 3946599 and 3946608.

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 polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3744 + ... + 4680.

Almost surely, 2^3946644 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 3946644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5561402).

3946644 is an abundant number, since it is smaller than the sum of its proper divisors (7176160).

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

3946644 is a wasteful number, since it uses less digits than its factorization.

3946644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 955 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 3946644 is about 1986.6162185989. The cubic root of 3946644 is about 158.0311320377.

The spelling of 3946644 in words is "three million, nine hundred forty-six thousand, six hundred forty-four".