4022138 has 4 divisors (see below), whose sum is σ = 6033210. Its totient is φ = 2011068.

The previous prime is 4022113. The next prime is 4022143. The reversal of 4022138 is 8312204.

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., 3087049 + 935089 = 1757^2 + 967^2 .

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005533 + ... + 1005536.

Almost surely, 2^4022138 is an apocalyptic number.

4022138 is a deficient number, since it is larger than the sum of its proper divisors (2011072).

4022138 is a wasteful number, since it uses less digits than its factorization.

4022138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011071.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 4022138 is about 2005.5268634451. The cubic root of 4022138 is about 159.0324156316.

The spelling of 4022138 in words is "four million, twenty-two thousand, one hundred thirty-eight".