3667805 has 4 divisors (see below), whose sum is σ = 4401372. Its totient is φ = 2934240.

The previous prime is 3667753. The next prime is 3667823. The reversal of 3667805 is 5087663.

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: 5087663 = 7 ⋅726809.

It can be written as a sum of positive squares in 2 ways, for example, as 988036 + 2679769 = 994^2 + 1637^2 .

It is not a de Polignac number, because 3667805 - 2²⁰ = 2619229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366776 + ... + 366785.

It is an arithmetic number, because the mean of its divisors is an integer number (1100343).

Almost surely, 2^3667805 is an apocalyptic number.

It is an amenable number.

3667805 is a deficient number, since it is larger than the sum of its proper divisors (733567).

3667805 is an equidigital number, since it uses as much as digits as its factorization.

3667805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733566.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 3667805 is about 1915.1514300441. The cubic root of 3667805 is about 154.2181229096.

The spelling of 3667805 in words is "three million, six hundred sixty-seven thousand, eight hundred five".