408687 has 8 divisors (see below), whose sum is σ = 568704. Its totient is φ = 260568.

The previous prime is 408677. The next prime is 408689. The reversal of 408687 is 786804.

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

It is not a de Polignac number, because 408687 - 2⁶ = 408623 is a prime.

408687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2893 + ... + 3030.

It is an arithmetic number, because the mean of its divisors is an integer number (71088).

2⁴⁰⁸⁶⁸⁷ is an apocalyptic number.

408687 is a deficient number, since it is larger than the sum of its proper divisors (160017).

408687 is a wasteful number, since it uses less digits than its factorization.

408687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5949.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 408687 is about 639.2863208297. The cubic root of 408687 is about 74.2102009839.

The spelling of 408687 in words is "four hundred eight thousand, six hundred eighty-seven".