409189812 has 12 divisors (see below), whose sum is σ = 954776256. Its totient is φ = 136396600.

The previous prime is 409189811. The next prime is 409189817. The reversal of 409189812 is 218981904.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409189811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17049564 + ... + 17049587.

It is an arithmetic number, because the mean of its divisors is an integer number (79564688).

Almost surely, 2^409189812 is an apocalyptic number.

It is an amenable number.

409189812 is an abundant number, since it is smaller than the sum of its proper divisors (545586444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

409189812 is a wasteful number, since it uses less digits than its factorization.

409189812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34099158 (or 34099156 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 409189812 is about 20228.4406714902. The cubic root of 409189812 is about 742.4062238016.

The spelling of 409189812 in words is "four hundred nine million, one hundred eighty-nine thousand, eight hundred twelve".