408819 has 4 divisors (see below), whose sum is σ = 545096. Its totient is φ = 272544.

The previous prime is 408817. The next prime is 408841. The reversal of 408819 is 918804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 408819 - 2¹ = 408817 is a prime.

It is a super-2 number, since 2×408819² = 334265949522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

408819 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (408817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68134 + ... + 68139.

It is an arithmetic number, because the mean of its divisors is an integer number (136274).

2⁴⁰⁸⁸¹⁹ is an apocalyptic number.

408819 is a deficient number, since it is larger than the sum of its proper divisors (136277).

408819 is a wasteful number, since it uses less digits than its factorization.

408819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136276.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 408819 is about 639.3895526203. The cubic root of 408819 is about 74.2181897317.

The spelling of 408819 in words is "four hundred eight thousand, eight hundred nineteen".