2038409 has 4 divisors (see below), whose sum is σ = 2057220. Its totient is φ = 2019600.

The previous prime is 2038403. The next prime is 2038411. The reversal of 2038409 is 9048302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 1177225 = 928^2 + 1085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2038409 is a prime.

It is a super-2 number, since 2×2038409² = 8310222502562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2038403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9242 + ... + 9459.

It is an arithmetic number, because the mean of its divisors is an integer number (514305).

2^2038409 is an apocalyptic number.

It is an amenable number.

2038409 is a deficient number, since it is larger than the sum of its proper divisors (18811).

2038409 is a wasteful number, since it uses less digits than its factorization.

2038409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18810.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2038409 is about 1427.7286156690. The cubic root of 2038409 is about 126.7935347837.

It can be divided in two parts, 20 and 38409, that multiplied together give a triangular number (768180 = T₁₂₃₉).

The spelling of 2038409 in words is "two million, thirty-eight thousand, four hundred nine".