3661138 has 8 divisors (see below), whose sum is σ = 5914188. Its totient is φ = 1689744.

The previous prime is 3661123. The next prime is 3661139. The reversal of 3661138 is 8311663.

It can be written as a sum of positive squares in 2 ways, for example, as 3433609 + 227529 = 1853^2 + 477^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (3661139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70381 + ... + 70432.

Almost surely, 2^3661138 is an apocalyptic number.

3661138 is a deficient number, since it is larger than the sum of its proper divisors (2253050).

3661138 is a wasteful number, since it uses less digits than its factorization.

3661138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140828.

The product of its digits is 2592, while the sum is 28.

The square root of 3661138 is about 1913.4100449198. The cubic root of 3661138 is about 154.1246250430.

The spelling of 3661138 in words is "three million, six hundred sixty-one thousand, one hundred thirty-eight".