408238281 has 24 divisors (see below), whose sum is σ = 644061600. Its totient is φ = 247118400.

The previous prime is 408238253. The next prime is 408238297. The reversal of 408238281 is 182832804.

It is a happy number.

It is not a de Polignac number, because 408238281 - 2¹⁰ = 408237257 is a prime.

It is a super-2 number, since 2×408238281² = 333316988147669922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408238211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 101886 + ... + 105816.

It is an arithmetic number, because the mean of its divisors is an integer number (26835900).

Almost surely, 2^408238281 is an apocalyptic number.

It is an amenable number.

408238281 is a deficient number, since it is larger than the sum of its proper divisors (235823319).

408238281 is a wasteful number, since it uses less digits than its factorization.

408238281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997 (or 4994 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 408238281 is about 20204.9073494535. The cubic root of 408238281 is about 741.8303127399.

The spelling of 408238281 in words is "four hundred eight million, two hundred thirty-eight thousand, two hundred eighty-one".