2538809 has 16 divisors (see below), whose sum is σ = 3263232. Its totient is φ = 1919808.

The previous prime is 2538803. The next prime is 2538817. The reversal of 2538809 is 9088352.

It is a cyclic number.

It is not a de Polignac number, because 2538809 - 2¹² = 2534713 is a prime.

It is a super-2 number, since 2×2538809² = 12891102276962, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2538803) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1487 + ... + 2699.

It is an arithmetic number, because the mean of its divisors is an integer number (203952).

2^2538809 is an apocalyptic number.

It is an amenable number.

2538809 is a deficient number, since it is larger than the sum of its proper divisors (724423).

2538809 is a wasteful number, since it uses less digits than its factorization.

2538809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 2538809 is about 1593.3640513078. The cubic root of 2538809 is about 136.4195700371.

It can be divided in two parts, 25 and 38809, that multiplied together give a square (970225 = 985²).

The spelling of 2538809 in words is "two million, five hundred thirty-eight thousand, eight hundred nine".