3960815 has 4 divisors (see below), whose sum is σ = 4752984. Its totient is φ = 3168648.

The previous prime is 3960811. The next prime is 3960829. The reversal of 3960815 is 5180693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5180693 = 7 ⋅740099.

It is a cyclic number.

It is not a de Polignac number, because 3960815 - 2² = 3960811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3960811) 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 3 ways as a sum of consecutive naturals, for example, 396077 + ... + 396086.

It is an arithmetic number, because the mean of its divisors is an integer number (1188246).

Almost surely, 2^3960815 is an apocalyptic number.

3960815 is a deficient number, since it is larger than the sum of its proper divisors (792169).

3960815 is an equidigital number, since it uses as much as digits as its factorization.

3960815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792168.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3960815 is about 1990.1796401330. The cubic root of 3960815 is about 158.2200507019.

The spelling of 3960815 in words is "three million, nine hundred sixty thousand, eight hundred fifteen".