209798044 has 12 divisors (see below), whose sum is σ = 367290000. Its totient is φ = 104858048.

The previous prime is 209798033. The next prime is 209798051. The reversal of 209798044 is 440897902.

It is a congruent number.

It is an unprimeable number.

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, 3252 + ... + 20740.

It is an arithmetic number, because the mean of its divisors is an integer number (30607500).

Almost surely, 2^209798044 is an apocalyptic number.

It is an amenable number.

209798044 is a deficient number, since it is larger than the sum of its proper divisors (157491956).

209798044 is a wasteful number, since it uses less digits than its factorization.

209798044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20492 (or 20490 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 209798044 is about 14484.4069260705. The cubic root of 209798044 is about 594.2015927815.

The spelling of 209798044 in words is "two hundred nine million, seven hundred ninety-eight thousand, forty-four".