4449780 has 72 divisors (see below), whose sum is σ = 13759200. Its totient is φ = 1163712.

The previous prime is 4449773. The next prime is 4449793. The reversal of 4449780 is 879444.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 10411 + ... + 10829.

It is an arithmetic number, because the mean of its divisors is an integer number (191100).

Almost surely, 2^4449780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4449780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6879600).

4449780 is an abundant number, since it is smaller than the sum of its proper divisors (9309420).

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

4449780 is a wasteful number, since it uses less digits than its factorization.

4449780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 4449780 is about 2109.4501653274. The cubic root of 4449780 is about 164.4799050357.

The spelling of 4449780 in words is "four million, four hundred forty-nine thousand, seven hundred eighty".