408520381794 has 128 divisors (see below), whose sum is σ = 988762767360. Its totient is φ = 109920089664.

The previous prime is 408520381757. The next prime is 408520381817. The reversal of 408520381794 is 497183025804.

It is a happy number.

It is a super-2 number, since 2×408520381794² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 104559189 + ... + 104563095.

It is an arithmetic number, because the mean of its divisors is an integer number (7724709120).

Almost surely, 2^408520381794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408520381794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494381383680).

408520381794 is an abundant number, since it is smaller than the sum of its proper divisors (580242385566).

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

408520381794 is a wasteful number, since it uses less digits than its factorization.

408520381794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 408520381794 in words is "four hundred eight billion, five hundred twenty million, three hundred eighty-one thousand, seven hundred ninety-four".