408447 has 12 divisors (see below), whose sum is σ = 635544. Its totient is φ = 251280.

The previous prime is 408437. The next prime is 408461. The reversal of 408447 is 744804.

It is not a de Polignac number, because 408447 - 2⁴ = 408431 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 408447.

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 11 ways as a sum of consecutive naturals, for example, 1629 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (52962).

2⁴⁰⁸⁴⁴⁷ is an apocalyptic number.

408447 is a deficient number, since it is larger than the sum of its proper divisors (227097).

408447 is a wasteful number, since it uses less digits than its factorization.

408447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510 (or 3507 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 408447 is about 639.0985839446. The cubic root of 408447 is about 74.1956715798.

The spelling of 408447 in words is "four hundred eight thousand, four hundred forty-seven".