3928115 has 4 divisors (see below), whose sum is σ = 4713744. Its totient is φ = 3142488.

The previous prime is 3928109. The next prime is 3928123. The reversal of 3928115 is 5118293.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3928115 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 392807 + ... + 392816.

It is an arithmetic number, because the mean of its divisors is an integer number (1178436).

Almost surely, 2^3928115 is an apocalyptic number.

3928115 is a deficient number, since it is larger than the sum of its proper divisors (785629).

3928115 is an equidigital number, since it uses as much as digits as its factorization.

3928115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785628.

The product of its digits is 2160, while the sum is 29.

The square root of 3928115 is about 1981.9472747780. The cubic root of 3928115 is about 157.7834318582.

The spelling of 3928115 in words is "three million, nine hundred twenty-eight thousand, one hundred fifteen".