2009404389 has 8 divisors (see below), whose sum is σ = 2679421600. Its totient is φ = 1339495056.

The previous prime is 2009404379. The next prime is 2009404391. The reversal of 2009404389 is 9834049002.

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

It is not a de Polignac number, because 2009404389 - 2¹⁶ = 2009338853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009404379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40887 + ... + 75435.

It is an arithmetic number, because the mean of its divisors is an integer number (334927700).

Almost surely, 2^2009404389 is an apocalyptic number.

It is an amenable number.

2009404389 is a deficient number, since it is larger than the sum of its proper divisors (670017211).

2009404389 is a wasteful number, since it uses less digits than its factorization.

2009404389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53939.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 2009404389 is about 44826.3805030029. The cubic root of 2009404389 is about 1261.8927606046.

The spelling of 2009404389 in words is "two billion, nine million, four hundred four thousand, three hundred eighty-nine".