409982 has 8 divisors (see below), whose sum is σ = 647400. Its totient is φ = 194184.

The previous prime is 409967. The next prime is 409987. The reversal of 409982 is 289904.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409987) by changing a digit.

409982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5357 + ... + 5432.

It is an arithmetic number, because the mean of its divisors is an integer number (80925).

2⁴⁰⁹⁹⁸² is an apocalyptic number.

409982 is a deficient number, since it is larger than the sum of its proper divisors (237418).

409982 is a wasteful number, since it uses less digits than its factorization.

409982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10810.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 409982 is about 640.2983679504. The cubic root of 409982 is about 74.2885012338.

Adding to 409982 its sum of digits (32), we get a palindrome (410014).

The spelling of 409982 in words is "four hundred nine thousand, nine hundred eighty-two".