408868281 has 6 divisors (see below), whose sum is σ = 590587530. Its totient is φ = 272578848.

The previous prime is 408868267. The next prime is 408868387. The reversal of 408868281 is 182868804.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 408848400 + 19881 = 20220^2 + 141^2 .

It is not a de Polignac number, because 408868281 - 2⁵ = 408868249 is a prime.

It is a super-2 number, since 2×408868281² = 334346542415789922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408868261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22714896 + ... + 22714913.

It is an arithmetic number, because the mean of its divisors is an integer number (98431255).

Almost surely, 2^408868281 is an apocalyptic number.

It is an amenable number.

408868281 is a deficient number, since it is larger than the sum of its proper divisors (181719249).

408868281 is a wasteful number, since it uses less digits than its factorization.

408868281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45429815 (or 45429812 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The square root of 408868281 is about 20220.4916112344. The cubic root of 408868281 is about 742.2117181720.

The spelling of 408868281 in words is "four hundred eight million, eight hundred sixty-eight thousand, two hundred eighty-one".