3656138 has 4 divisors (see below), whose sum is σ = 5484210. Its totient is φ = 1828068.

The previous prime is 3656137. The next prime is 3656141. The reversal of 3656138 is 8316563.

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., 2199289 + 1456849 = 1483^2 + 1207^2 .

It is not an unprimeable number, because it can be changed into a prime (3656137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914033 + ... + 914036.

Almost surely, 2^3656138 is an apocalyptic number.

3656138 is a deficient number, since it is larger than the sum of its proper divisors (1828072).

3656138 is a wasteful number, since it uses less digits than its factorization.

3656138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828071.

The product of its digits is 12960, while the sum is 32.

The square root of 3656138 is about 1912.1030306968. The cubic root of 3656138 is about 154.0544306386.

The spelling of 3656138 in words is "three million, six hundred fifty-six thousand, one hundred thirty-eight".