3805138 has 4 divisors (see below), whose sum is σ = 5707710. Its totient is φ = 1902568.

The previous prime is 3805133. The next prime is 3805159. The reversal of 3805138 is 8315083.

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., 3713329 + 91809 = 1927^2 + 303^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3805133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951283 + ... + 951286.

Almost surely, 2^3805138 is an apocalyptic number.

3805138 is a deficient number, since it is larger than the sum of its proper divisors (1902572).

3805138 is a wasteful number, since it uses less digits than its factorization.

3805138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902571.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 3805138 is about 1950.6762929815. The cubic root of 3805138 is about 156.1193749879.

The spelling of 3805138 in words is "three million, eight hundred five thousand, one hundred thirty-eight".