3688819 has 4 divisors (see below), whose sum is σ = 3743944. Its totient is φ = 3633696.

The previous prime is 3688801. The next prime is 3688837. The reversal of 3688819 is 9188863.

It is a happy number.

3688819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9188863 = 1163 ⋅7901.

It is an interprime number because it is at equal distance from previous prime (3688801) and next prime (3688837).

It is a cyclic number.

It is not a de Polignac number, because 3688819 - 2⁵ = 3688787 is a prime.

It is a super-2 number, since 2×3688819² = 27214771229522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3688849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27462 + ... + 27595.

It is an arithmetic number, because the mean of its divisors is an integer number (935986).

Almost surely, 2^3688819 is an apocalyptic number.

3688819 is a deficient number, since it is larger than the sum of its proper divisors (55125).

3688819 is an equidigital number, since it uses as much as digits as its factorization.

3688819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55124.

The product of its digits is 82944, while the sum is 43.

The square root of 3688819 is about 1920.6298446083. The cubic root of 3688819 is about 154.5120834836.

The spelling of 3688819 in words is "three million, six hundred eighty-eight thousand, eight hundred nineteen".