3888945 has 16 divisors (see below), whose sum is σ = 6913920. Its totient is φ = 2074032.

The previous prime is 3888931. The next prime is 3888967. The reversal of 3888945 is 5498883.

It is not a de Polignac number, because 3888945 - 2²¹ = 1791793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3888945.

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, 14269 + ... + 14538.

It is an arithmetic number, because the mean of its divisors is an integer number (432120).

Almost surely, 2^3888945 is an apocalyptic number.

It is an amenable number.

3888945 is a deficient number, since it is larger than the sum of its proper divisors (3024975).

3888945 is a wasteful number, since it uses less digits than its factorization.

3888945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28821 (or 28815 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 3888945 is about 1972.0408210785. The cubic root of 3888945 is about 157.2572223356.

The spelling of 3888945 in words is "three million, eight hundred eighty-eight thousand, nine hundred forty-five".