3940819 has 4 divisors (see below), whose sum is σ = 3981544. Its totient is φ = 3900096.

The previous prime is 3940801. The next prime is 3940823. The reversal of 3940819 is 9180493.

3940819 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.

It is a cyclic number.

It is not a de Polignac number, because 3940819 - 2⁷ = 3940691 is a prime.

It is a super-2 number, since 2×3940819² = 31060108781522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3940319) 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, 20217 + ... + 20410.

It is an arithmetic number, because the mean of its divisors is an integer number (995386).

Almost surely, 2^3940819 is an apocalyptic number.

3940819 is a deficient number, since it is larger than the sum of its proper divisors (40725).

3940819 is an equidigital number, since it uses as much as digits as its factorization.

3940819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40724.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 3940819 is about 1985.1496165277. The cubic root of 3940819 is about 157.9533457296.

The spelling of 3940819 in words is "three million, nine hundred forty thousand, eight hundred nineteen".