4388138 has 4 divisors (see below), whose sum is σ = 6582210. Its totient is φ = 2194068.

The previous prime is 4388117. The next prime is 4388171. The reversal of 4388138 is 8318834.

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., 3433609 + 954529 = 1853^2 + 977^2 .

It is a Curzon number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4388098 and 4388107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097033 + ... + 1097036.

Almost surely, 2^4388138 is an apocalyptic number.

4388138 is a deficient number, since it is larger than the sum of its proper divisors (2194072).

4388138 is a wasteful number, since it uses less digits than its factorization.

4388138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2194071.

The product of its digits is 18432, while the sum is 35.

The square root of 4388138 is about 2094.7882947926. The cubic root of 4388138 is about 163.7168672160.

The spelling of 4388138 in words is "four million, three hundred eighty-eight thousand, one hundred thirty-eight".