3946478225 has 12 divisors (see below), whose sum is σ = 4907506956. Its totient is φ = 3148231680.

The previous prime is 3946478213. The next prime is 3946478227. The reversal of 3946478225 is 5228746493.

3946478225 is digitally balanced in base 3, 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 6 ways, for example, as 68178049 + 3878300176 = 8257^2 + 62276^2 .

It is a de Polignac number, because none of the positive numbers 2^k-3946478225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3946478227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214772 + ... + 232421.

It is an arithmetic number, because the mean of its divisors is an integer number (408958913).

Almost surely, 2^3946478225 is an apocalyptic number.

It is an amenable number.

3946478225 is a deficient number, since it is larger than the sum of its proper divisors (961028731).

3946478225 is a wasteful number, since it uses less digits than its factorization.

3946478225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447556 (or 447551 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The square root of 3946478225 is about 62821.0014644784. The cubic root of 3946478225 is about 1580.2891935795.

The spelling of 3946478225 in words is "three billion, nine hundred forty-six million, four hundred seventy-eight thousand, two hundred twenty-five".