428466869 has 2 divisors, whose sum is σ = 428466870. Its totient is φ = 428466868.

The previous prime is 428466763. The next prime is 428466881. The reversal of 428466869 is 968664824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268140625 + 160326244 = 16375^2 + 12662^2 .

It is a cyclic number.

It is not a de Polignac number, because 428466869 - 2²⁴ = 411689653 is a prime.

It is a super-2 number, since 2×428466869² = 367167715661326322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428466869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428466569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214233434 + 214233435.

It is an arithmetic number, because the mean of its divisors is an integer number (214233435).

Almost surely, 2^428466869 is an apocalyptic number.

It is an amenable number.

428466869 is a deficient number, since it is larger than the sum of its proper divisors (1).

428466869 is an equidigital number, since it uses as much as digits as its factorization.

428466869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 53.

The square root of 428466869 is about 20699.4412726527. The cubic root of 428466869 is about 753.8861220367.

The spelling of 428466869 in words is "four hundred twenty-eight million, four hundred sixty-six thousand, eight hundred sixty-nine".