3938645 has 8 divisors (see below), whose sum is σ = 5004504. Its totient is φ = 2965504.

The previous prime is 3938639. The next prime is 3938653. The reversal of 3938645 is 5468393.

3938645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 702244 + 3236401 = 838^2 + 1799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3938645 - 2⁴ = 3938629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3938599 and 3938608.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 23084 + ... + 23253.

It is an arithmetic number, because the mean of its divisors is an integer number (625563).

Almost surely, 2^3938645 is an apocalyptic number.

It is an amenable number.

3938645 is a deficient number, since it is larger than the sum of its proper divisors (1065859).

3938645 is a wasteful number, since it uses less digits than its factorization.

3938645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46359.

The product of its digits is 77760, while the sum is 38.

The square root of 3938645 is about 1984.6019752081. The cubic root of 3938645 is about 157.9242947685.

The spelling of 3938645 in words is "three million, nine hundred thirty-eight thousand, six hundred forty-five".