3958138 has 4 divisors (see below), whose sum is σ = 5937210. Its totient is φ = 1979068.

The previous prime is 3958109. The next prime is 3958147. The reversal of 3958138 is 8318593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8318593 = 17 ⋅489329.

It can be written as a sum of positive squares in only one way, i.e., 3636649 + 321489 = 1907^2 + 567^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3958097 and 3958106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989533 + ... + 989536.

Almost surely, 2^3958138 is an apocalyptic number.

3958138 is a deficient number, since it is larger than the sum of its proper divisors (1979072).

3958138 is a wasteful number, since it uses less digits than its factorization.

3958138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979071.

The product of its digits is 25920, while the sum is 37.

The square root of 3958138 is about 1989.5069741019. The cubic root of 3958138 is about 158.1843972203.

It can be divided in two parts, 3958 and 138, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3958138 in words is "three million, nine hundred fifty-eight thousand, one hundred thirty-eight".