4449840 has 40 divisors (see below), whose sum is σ = 13795248. Its totient is φ = 1186560.

The previous prime is 4449829. The next prime is 4449859. The reversal of 4449840 is 489444.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9031 + ... + 9510.

Almost surely, 2^4449840 is an apocalyptic number.

4449840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4449840 is an abundant number, since it is smaller than the sum of its proper divisors (9345408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4449840 is a wasteful number, since it uses less digits than its factorization.

4449840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18557 (or 18551 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 4449840 is about 2109.4643869950. The cubic root of 4449840 is about 164.4806443045.

The spelling of 4449840 in words is "four million, four hundred forty-nine thousand, eight hundred forty".