409561382 has 16 divisors (see below), whose sum is σ = 666347472. Its totient is φ = 188033280.

The previous prime is 409561379. The next prime is 409561387. The reversal of 409561382 is 283165904.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409561387) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 145508 + ... + 148295.

It is an arithmetic number, because the mean of its divisors is an integer number (41646717).

Almost surely, 2^409561382 is an apocalyptic number.

409561382 is a deficient number, since it is larger than the sum of its proper divisors (256786090).

409561382 is a wasteful number, since it uses less digits than its factorization.

409561382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293863.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 409561382 is about 20237.6229335364. The cubic root of 409561382 is about 742.6308729469.

The spelling of 409561382 in words is "four hundred nine million, five hundred sixty-one thousand, three hundred eighty-two".