428629 has 2 divisors, whose sum is σ = 428630. Its totient is φ = 428628.

The previous prime is 428579. The next prime is 428633. The reversal of 428629 is 926824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248004 + 180625 = 498^2 + 425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214314 + 214315.

It is an arithmetic number, because the mean of its divisors is an integer number (214315).

2⁴²⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

428629 is a deficient number, since it is larger than the sum of its proper divisors (1).

428629 is an equidigital number, since it uses as much as digits as its factorization.

428629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 428629 is about 654.6976401363. The cubic root of 428629 is about 75.3981199709.

The spelling of 428629 in words is "four hundred twenty-eight thousand, six hundred twenty-nine".