428857841 has 2 divisors, whose sum is σ = 428857842. Its totient is φ = 428857840.

The previous prime is 428857811. The next prime is 428857859. The reversal of 428857841 is 148758824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327754816 + 101103025 = 18104^2 + 10055^2 .

It is a cyclic number.

It is not a de Polignac number, because 428857841 - 2¹⁰ = 428856817 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428857811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214428920 + 214428921.

It is an arithmetic number, because the mean of its divisors is an integer number (214428921).

Almost surely, 2^428857841 is an apocalyptic number.

It is an amenable number.

428857841 is a deficient number, since it is larger than the sum of its proper divisors (1).

428857841 is an equidigital number, since it uses as much as digits as its factorization.

428857841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573440, while the sum is 47.

The square root of 428857841 is about 20708.8831422653. The cubic root of 428857841 is about 754.1153569982.

The spelling of 428857841 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred forty-one".