409618 has 16 divisors (see below), whose sum is σ = 687456. Its totient is φ = 181440.

The previous prime is 409609. The next prime is 409639. The reversal of 409618 is 816904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (42966).

2⁴⁰⁹⁶¹⁸ is an apocalyptic number.

409618 is a deficient number, since it is larger than the sum of its proper divisors (277838).

409618 is a wasteful number, since it uses less digits than its factorization.

409618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 409618 is about 640.0140623455. The cubic root of 409618 is about 74.2665091943.

It can be divided in two parts, 4096 and 18, that added together give a palindrome (4114).

The spelling of 409618 in words is "four hundred nine thousand, six hundred eighteen".