408487 has 4 divisors (see below), whose sum is σ = 421696. Its totient is φ = 395280.

The previous prime is 408479. The next prime is 408491. The reversal of 408487 is 784804.

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

It is a cyclic number.

It is not a de Polignac number, because 408487 - 2³ = 408479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 13177 = 408487 / (4 + 0 + 8 + 4 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408427) 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, 6558 + ... + 6619.

It is an arithmetic number, because the mean of its divisors is an integer number (105424).

2⁴⁰⁸⁴⁸⁷ is an apocalyptic number.

408487 is a deficient number, since it is larger than the sum of its proper divisors (13209).

408487 is a wasteful number, since it uses less digits than its factorization.

408487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13208.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 408487 is about 639.1298772550. The cubic root of 408487 is about 74.1980935423.

The spelling of 408487 in words is "four hundred eight thousand, four hundred eighty-seven".