3928505 has 16 divisors (see below), whose sum is σ = 5443200. Its totient is φ = 2666112.

The previous prime is 3928493. The next prime is 3928553. The reversal of 3928505 is 5058293.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3928505 - 2¹² = 3924409 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3221 + ... + 4269.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^3928505 is an apocalyptic number.

3928505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3928505 is a deficient number, since it is larger than the sum of its proper divisors (1514695).

3928505 is a wasteful number, since it uses less digits than its factorization.

3928505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 3928505 is about 1982.0456604226. The cubic root of 3928505 is about 157.7886534893.

The spelling of 3928505 in words is "three million, nine hundred twenty-eight thousand, five hundred five".