3685138 has 4 divisors (see below), whose sum is σ = 5527710. Its totient is φ = 1842568.

The previous prime is 3685133. The next prime is 3685147. The reversal of 3685138 is 8315863.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8315863 = 19 ⋅437677.

It can be written as a sum of positive squares in only one way, i.e., 3470769 + 214369 = 1863^2 + 463^2 .

It is not an unprimeable number, because it can be changed into a prime (3685133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 921283 + ... + 921286.

Almost surely, 2^3685138 is an apocalyptic number.

3685138 is a deficient number, since it is larger than the sum of its proper divisors (1842572).

3685138 is a wasteful number, since it uses less digits than its factorization.

3685138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842571.

The product of its digits is 17280, while the sum is 34.

The square root of 3685138 is about 1919.6713260347. The cubic root of 3685138 is about 154.4606715214.

The spelling of 3685138 in words is "three million, six hundred eighty-five thousand, one hundred thirty-eight".