3928705 has 16 divisors (see below), whose sum is σ = 5231808. Its totient is φ = 2808000.

The previous prime is 3928703. The next prime is 3928709. The reversal of 3928705 is 5078293.

It is not a de Polignac number, because 3928705 - 2¹ = 3928703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2770 + ... + 3940.

It is an arithmetic number, because the mean of its divisors is an integer number (326988).

Almost surely, 2^3928705 is an apocalyptic number.

It is an amenable number.

3928705 is a deficient number, since it is larger than the sum of its proper divisors (1303103).

3928705 is a wasteful number, since it uses less digits than its factorization.

3928705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 3928705 is about 1982.0961127049. The cubic root of 3928705 is about 157.7913311147.

The spelling of 3928705 in words is "three million, nine hundred twenty-eight thousand, seven hundred five".