428664433 has 2 divisors, whose sum is σ = 428664434. Its totient is φ = 428664432.

The previous prime is 428664427. The next prime is 428664493. The reversal of 428664433 is 334466824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296115264 + 132549169 = 17208^2 + 11513^2 .

It is a cyclic number.

It is not a de Polignac number, because 428664433 - 2¹⁷ = 428533361 is a prime.

It is a super-2 number, since 2×428664433² = 367506392238422978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (428664493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214332216 + 214332217.

It is an arithmetic number, because the mean of its divisors is an integer number (214332217).

Almost surely, 2^428664433 is an apocalyptic number.

It is an amenable number.

428664433 is a deficient number, since it is larger than the sum of its proper divisors (1).

428664433 is an equidigital number, since it uses as much as digits as its factorization.

428664433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 40.

The square root of 428664433 is about 20704.2129287737. The cubic root of 428664433 is about 754.0019753130.

The spelling of 428664433 in words is "four hundred twenty-eight million, six hundred sixty-four thousand, four hundred thirty-three".