3138946 has 4 divisors (see below), whose sum is σ = 4708422. Its totient is φ = 1569472.

The previous prime is 3138943. The next prime is 3138953. The reversal of 3138946 is 6498313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6498313 = 31 ⋅209623.

It can be written as a sum of positive squares in only one way, i.e., 2852721 + 286225 = 1689^2 + 535^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3138943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 784735 + ... + 784738.

Almost surely, 2^3138946 is an apocalyptic number.

3138946 is a deficient number, since it is larger than the sum of its proper divisors (1569476).

3138946 is a wasteful number, since it uses less digits than its factorization.

3138946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569475.

The product of its digits is 15552, while the sum is 34.

The square root of 3138946 is about 1771.7070864000. The cubic root of 3138946 is about 146.4180487268.

The spelling of 3138946 in words is "three million, one hundred thirty-eight thousand, nine hundred forty-six".