408623505821920 has 48 divisors (see below), whose sum is σ = 965388267124848. Its totient is φ = 163446822922240.

The previous prime is 408623505821863. The next prime is 408623505821929. The reversal of 408623505821920 is 29128505326804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408623505821929) 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, 9965161 + ... + 30274600.

It is an arithmetic number, because the mean of its divisors is an integer number (20112255565101).

Almost surely, 2^{408623505821920} is an apocalyptic number.

408623505821920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

408623505821920 is an abundant number, since it is smaller than the sum of its proper divisors (556764761302928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

408623505821920 is a wasteful number, since it uses less digits than its factorization.

408623505821920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40303243 (or 40303235 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 408623505821920 in words is "four hundred eight trillion, six hundred twenty-three billion, five hundred five million, eight hundred twenty-one thousand, nine hundred twenty".