4390945 has 16 divisors (see below), whose sum is σ = 5810112. Its totient is φ = 3165120.

The previous prime is 4390937. The next prime is 4391003. The reversal of 4390945 is 5490934.

It is not a de Polignac number, because 4390945 - 2³ = 4390937 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4390945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2010 + ... + 3580.

It is an arithmetic number, because the mean of its divisors is an integer number (363132).

Almost surely, 2^4390945 is an apocalyptic number.

It is an amenable number.

4390945 is a deficient number, since it is larger than the sum of its proper divisors (1419167).

4390945 is a wasteful number, since it uses less digits than its factorization.

4390945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 4390945 is about 2095.4581837870. The cubic root of 4390945 is about 163.7517685259.

It can be divided in two parts, 4390 and 945, that added together give a palindrome (5335).

The spelling of 4390945 in words is "four million, three hundred ninety thousand, nine hundred forty-five".