408428771 has 2 divisors, whose sum is σ = 408428772. Its totient is φ = 408428770.

The previous prime is 408428753. The next prime is 408428821. The reversal of 408428771 is 177824804.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408428771 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (408428711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204214385 + 204214386.

It is an arithmetic number, because the mean of its divisors is an integer number (204214386).

Almost surely, 2^408428771 is an apocalyptic number.

408428771 is a deficient number, since it is larger than the sum of its proper divisors (1).

408428771 is an equidigital number, since it uses as much as digits as its factorization.

408428771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 408428771 is about 20209.6207534926. The cubic root of 408428771 is about 741.9456777846.

The spelling of 408428771 in words is "four hundred eight million, four hundred twenty-eight thousand, seven hundred seventy-one".