3938138 has 4 divisors (see below), whose sum is σ = 5907210. Its totient is φ = 1969068.

The previous prime is 3938119. The next prime is 3938141. The reversal of 3938138 is 8318393.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8318393 = 43 ⋅193451.

It can be written as a sum of positive squares in only one way, i.e., 3193369 + 744769 = 1787^2 + 863^2 .

It is a super-3 number, since 3×3938138³ (a number of 21 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3938098 and 3938107.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984533 + ... + 984536.

Almost surely, 2^3938138 is an apocalyptic number.

3938138 is a deficient number, since it is larger than the sum of its proper divisors (1969072).

3938138 is a wasteful number, since it uses less digits than its factorization.

3938138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969071.

The product of its digits is 15552, while the sum is 35.

The square root of 3938138 is about 1984.4742376761. The cubic root of 3938138 is about 157.9175182373.

The spelling of 3938138 in words is "three million, nine hundred thirty-eight thousand, one hundred thirty-eight".