3928465 has 4 divisors (see below), whose sum is σ = 4714164. Its totient is φ = 3142768.

The previous prime is 3928453. The next prime is 3928487. The reversal of 3928465 is 5648293.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1979649 + 1948816 = 1407^2 + 1396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3928465 is a prime.

It is a d-powerful number, because it can be written as 3⁶ + 9² + 2 + 8⁵ + 4⁹ + 6⁸ + 5⁹ .

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, 392842 + ... + 392851.

It is an arithmetic number, because the mean of its divisors is an integer number (1178541).

Almost surely, 2^3928465 is an apocalyptic number.

It is an amenable number.

3928465 is a deficient number, since it is larger than the sum of its proper divisors (785699).

3928465 is an equidigital number, since it uses as much as digits as its factorization.

3928465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785698.

The product of its digits is 51840, while the sum is 37.

The square root of 3928465 is about 1982.0355698120. The cubic root of 3928465 is about 157.7881179533.

The spelling of 3928465 in words is "three million, nine hundred twenty-eight thousand, four hundred sixty-five".