2809238 has 8 divisors (see below), whose sum is σ = 4316760. Its totient is φ = 1370320.

The previous prime is 2809223. The next prime is 2809241. The reversal of 2809238 is 8329082.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17048 + ... + 17211.

It is an arithmetic number, because the mean of its divisors is an integer number (539595).

2^2809238 is an apocalyptic number.

2809238 is a deficient number, since it is larger than the sum of its proper divisors (1507522).

2809238 is a wasteful number, since it uses less digits than its factorization.

2809238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34302.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 2809238 is about 1676.0781604687. The cubic root of 2809238 is about 141.1008114958.

The spelling of 2809238 in words is "two million, eight hundred nine thousand, two hundred thirty-eight".