409743842 has 8 divisors (see below), whose sum is σ = 635809500. Its totient is φ = 197807344.

The previous prime is 409743839. The next prime is 409743863. The reversal of 409743842 is 248347904.

It can be written as a sum of positive squares in 2 ways, for example, as 353778481 + 55965361 = 18809^2 + 7481^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 409743842.

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, 3532217 + ... + 3532332.

Almost surely, 2^409743842 is an apocalyptic number.

409743842 is a deficient number, since it is larger than the sum of its proper divisors (226065658).

409743842 is a wasteful number, since it uses less digits than its factorization.

409743842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7064580.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 409743842 is about 20242.1303720730. The cubic root of 409743842 is about 742.7411375032.

The spelling of 409743842 in words is "four hundred nine million, seven hundred forty-three thousand, eight hundred forty-two".