3904845 has 16 divisors (see below), whose sum is σ = 7140480. Its totient is φ = 1785024.

The previous prime is 3904829. The next prime is 3904877. The reversal of 3904845 is 5484093.

It is not a de Polignac number, because 3904845 - 2⁴ = 3904829 is a prime.

It is a Curzon number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 18490 + ... + 18699.

It is an arithmetic number, because the mean of its divisors is an integer number (446280).

Almost surely, 2^3904845 is an apocalyptic number.

3904845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3904845 is a deficient number, since it is larger than the sum of its proper divisors (3235635).

3904845 is a wasteful number, since it uses less digits than its factorization.

3904845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37204.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 3904845 is about 1976.0680656293. The cubic root of 3904845 is about 157.4712469558.

It can be divided in two parts, 39048 and 45, that added together give a palindrome (39093).

The spelling of 3904845 in words is "three million, nine hundred four thousand, eight hundred forty-five".