2009408 has 14 divisors (see below), whose sum is σ = 3987546. Its totient is φ = 1004672.

The previous prime is 2009407. The next prime is 2009437. The reversal of 2009408 is 8049002.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 350464 = 1288^2 + 592^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15635 + ... + 15762.

2^2009408 is an apocalyptic number.

It is an amenable number.

2009408 is a deficient number, since it is larger than the sum of its proper divisors (1978138).

2009408 is an equidigital number, since it uses as much as digits as its factorization.

2009408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31409 (or 31399 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2009408 is about 1417.5358901982. The cubic root of 2009408 is about 126.1893516499.

The spelling of 2009408 in words is "two million, nine thousand, four hundred eight".