408985663 has 8 divisors (see below), whose sum is σ = 419812416. Its totient is φ = 398292000.

The previous prime is 408985649. The next prime is 408985693. The reversal of 408985663 is 366589804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 408985663 - 2⁹ = 408985151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408985613) 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, 27031 + ... + 39352.

It is an arithmetic number, because the mean of its divisors is an integer number (52476552).

Almost surely, 2^408985663 is an apocalyptic number.

408985663 is a deficient number, since it is larger than the sum of its proper divisors (10826753).

408985663 is a wasteful number, since it uses less digits than its factorization.

408985663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66545.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 408985663 is about 20223.3939535381. The cubic root of 408985663 is about 742.2827385666.

The spelling of 408985663 in words is "four hundred eight million, nine hundred eighty-five thousand, six hundred sixty-three".