3900449 has 6 divisors (see below), whose sum is σ = 4537314. Its totient is φ = 3343200.

The previous prime is 3900439. The next prime is 3900469. The reversal of 3900449 is 9440093.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1960000 + 1940449 = 1400^2 + 1393^2 .

It is not a de Polignac number, because 3900449 - 2⁴ = 3900433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3900439) 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, 39752 + ... + 39849.

It is an arithmetic number, because the mean of its divisors is an integer number (756219).

Almost surely, 2^3900449 is an apocalyptic number.

It is an amenable number.

3900449 is a deficient number, since it is larger than the sum of its proper divisors (636865).

3900449 is an equidigital number, since it uses as much as digits as its factorization.

3900449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79615 (or 79608 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 3900449 is about 1974.9554425353. The cubic root of 3900449 is about 157.4121320583.

The spelling of 3900449 in words is "three million, nine hundred thousand, four hundred forty-nine".