408321375840 has 576 divisors, whose sum is σ = 1668566075904. Its totient is φ = 92362457088.

The previous prime is 408321375829. The next prime is 408321375841. The reversal of 408321375840 is 48573123804.

408321375840 is a `hidden beast` number, since 4 + 0 + 8 + 32 + 1 + 37 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408321375841) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26391787 + ... + 26407253.

It is an arithmetic number, because the mean of its divisors is an integer number (2896816104).

Almost surely, 2^408321375840 is an apocalyptic number.

408321375840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408321375840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834283037952).

408321375840 is an abundant number, since it is smaller than the sum of its proper divisors (1260244700064).

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

408321375840 is a wasteful number, since it uses less digits than its factorization.

408321375840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15601 (or 15581 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 408321375840 in words is "four hundred eight billion, three hundred twenty-one million, three hundred seventy-five thousand, eight hundred forty".