9780449 has 6 divisors (see below), whose sum is σ = 11377314. Its totient is φ = 8383200.

The previous prime is 9780439. The next prime is 9780473. The reversal of 9780449 is 9440879.

9780449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 1940449 = 2800^2 + 1393^2 .

It is not a de Polignac number, because 9780449 - 2²⁰ = 8731873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9780439) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 99752 + ... + 99849.

It is an arithmetic number, because the mean of its divisors is an integer number (1896219).

Almost surely, 2^9780449 is an apocalyptic number.

It is an amenable number.

9780449 is a deficient number, since it is larger than the sum of its proper divisors (1596865).

9780449 is a wasteful number, since it uses less digits than its factorization.

9780449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199615 (or 199608 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 9780449 is about 3127.3709405825. The cubic root of 9780449 is about 213.8550930380.

The spelling of 9780449 in words is "nine million, seven hundred eighty thousand, four hundred forty-nine".