4449645 has 24 divisors (see below), whose sum is σ = 7843992. Its totient is φ = 2332800.

The previous prime is 4449637. The next prime is 4449659. The reversal of 4449645 is 5469444.

4449645 is a `hidden beast` number, since 4 + 4 + 4 + 9 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 114921 + 4334724 = 339^2 + 2082^2 .

It is not a de Polignac number, because 4449645 - 2³ = 4449637 is a prime.

It is a super-3 number, since 3×4449645³ (a number of 21 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 1935 + ... + 3555.

It is an arithmetic number, because the mean of its divisors is an integer number (326833).

Almost surely, 2^4449645 is an apocalyptic number.

4449645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4449645 is a deficient number, since it is larger than the sum of its proper divisors (3394347).

4449645 is a wasteful number, since it uses less digits than its factorization.

4449645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1690 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 4449645 is about 2109.4181662250. The cubic root of 4449645 is about 164.4782416567.

The spelling of 4449645 in words is "four million, four hundred forty-nine thousand, six hundred forty-five".