3964138 has 4 divisors (see below), whose sum is σ = 5946210. Its totient is φ = 1982068.

The previous prime is 3964133. The next prime is 3964157. The reversal of 3964138 is 8314693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3583449 + 380689 = 1893^2 + 617^2 .

It is not an unprimeable number, because it can be changed into a prime (3964133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991033 + ... + 991036.

Almost surely, 2^3964138 is an apocalyptic number.

3964138 is a deficient number, since it is larger than the sum of its proper divisors (1982072).

3964138 is a wasteful number, since it uses less digits than its factorization.

3964138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982071.

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

The square root of 3964138 is about 1991.0143143634. The cubic root of 3964138 is about 158.2642855596.

The spelling of 3964138 in words is "three million, nine hundred sixty-four thousand, one hundred thirty-eight".