409930 has 8 divisors (see below), whose sum is σ = 737892. Its totient is φ = 163968.

The previous prime is 409909. The next prime is 409933. The reversal of 409930 is 39904.

It can be written as a sum of positive squares in 2 ways, for example, as 380689 + 29241 = 617^2 + 171^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 409895 and 409904.

It is not an unprimeable number, because it can be changed into a prime (409933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20487 + ... + 20506.

2⁴⁰⁹⁹³⁰ is an apocalyptic number.

409930 is a deficient number, since it is larger than the sum of its proper divisors (327962).

409930 is a wasteful number, since it uses less digits than its factorization.

409930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41000.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 409930 is about 640.2577605933. The cubic root of 409930 is about 74.2853603111.

The spelling of 409930 in words is "four hundred nine thousand, nine hundred thirty".