408383881 has 2 divisors, whose sum is σ = 408383882. Its totient is φ = 408383880.

The previous prime is 408383851. The next prime is 408383939. The reversal of 408383881 is 188383804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407393856 + 990025 = 20184^2 + 995^2 .

It is a cyclic number.

It is not a de Polignac number, because 408383881 - 2⁷ = 408383753 is a prime.

It is a super-2 number, since 2×408383881² = 333554788521244322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (408383851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204191940 + 204191941.

It is an arithmetic number, because the mean of its divisors is an integer number (204191941).

Almost surely, 2^408383881 is an apocalyptic number.

It is an amenable number.

408383881 is a deficient number, since it is larger than the sum of its proper divisors (1).

408383881 is an equidigital number, since it uses as much as digits as its factorization.

408383881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 408383881 is about 20208.5101133161. The cubic root of 408383881 is about 741.9184946182.

The spelling of 408383881 in words is "four hundred eight million, three hundred eighty-three thousand, eight hundred eighty-one".