401985808 has 60 divisors (see below), whose sum is σ = 959332572. Its totient is φ = 162140160.

The previous prime is 401985781. The next prime is 401985817. The reversal of 401985808 is 808589104.

It can be written as a sum of positive squares in 2 ways, for example, as 317124864 + 84860944 = 17808^2 + 9212^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1753 + ... + 28408.

Almost surely, 2^401985808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401985808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (479666286).

401985808 is an abundant number, since it is smaller than the sum of its proper divisors (557346764).

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

401985808 is a wasteful number, since it uses less digits than its factorization.

401985808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30200 (or 30187 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 401985808 is about 20049.5837363273. The cubic root of 401985808 is about 738.0235840711.

The spelling of 401985808 in words is "four hundred one million, nine hundred eighty-five thousand, eight hundred eight".