3857138 has 4 divisors (see below), whose sum is σ = 5785710. Its totient is φ = 1928568.

The previous prime is 3857137. The next prime is 3857141. The reversal of 3857138 is 8317583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317583 = 131 ⋅63493.

It can be written as a sum of positive squares in only one way, i.e., 2053489 + 1803649 = 1433^2 + 1343^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3857098 and 3857107.

It is not an unprimeable number, because it can be changed into a prime (3857137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964283 + ... + 964286.

Almost surely, 2^3857138 is an apocalyptic number.

3857138 is a deficient number, since it is larger than the sum of its proper divisors (1928572).

3857138 is a wasteful number, since it uses less digits than its factorization.

3857138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928571.

The product of its digits is 20160, while the sum is 35.

The square root of 3857138 is about 1963.9597755555. The cubic root of 3857138 is about 156.8273217436.

The spelling of 3857138 in words is "three million, eight hundred fifty-seven thousand, one hundred thirty-eight".