409185380 has 12 divisors (see below), whose sum is σ = 859289340. Its totient is φ = 163674144.

The previous prime is 409185323. The next prime is 409185391. The reversal of 409185380 is 83581904.

It can be written as a sum of positive squares in 2 ways, for example, as 87198244 + 321987136 = 9338^2 + 17944^2 .

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, 10229615 + ... + 10229654.

It is an arithmetic number, because the mean of its divisors is an integer number (71607445).

Almost surely, 2^409185380 is an apocalyptic number.

It is an amenable number.

409185380 is an abundant number, since it is smaller than the sum of its proper divisors (450103960).

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

409185380 is a wasteful number, since it uses less digits than its factorization.

409185380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20459278 (or 20459276 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 409185380 is about 20228.3311224629. The cubic root of 409185380 is about 742.4035434186.

The spelling of 409185380 in words is "four hundred nine million, one hundred eighty-five thousand, three hundred eighty".