3940819815 has 8 divisors (see below), whose sum is σ = 6305311728. Its totient is φ = 2101770560.

The previous prime is 3940819801. The next prime is 3940819819. The reversal of 3940819815 is 5189180493.

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

It is not a de Polignac number, because 3940819815 - 2⁸ = 3940819559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3940819819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 131360646 + ... + 131360675.

It is an arithmetic number, because the mean of its divisors is an integer number (788163966).

Almost surely, 2^3940819815 is an apocalyptic number.

3940819815 is a deficient number, since it is larger than the sum of its proper divisors (2364491913).

3940819815 is a wasteful number, since it uses less digits than its factorization.

3940819815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262721329.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 3940819815 is about 62775.9493357130. The cubic root of 3940819815 is about 1579.5335661839.

The spelling of 3940819815 in words is "three billion, nine hundred forty million, eight hundred nineteen thousand, eight hundred fifteen".