428633057 has 2 divisors, whose sum is σ = 428633058. Its totient is φ = 428633056.

The previous prime is 428633047. The next prime is 428633059. The reversal of 428633057 is 750336824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 427703761 + 929296 = 20681^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 428633057 - 2⁴ = 428633041 is a prime.

Together with 428633059, it forms a pair of twin primes.

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 428633057.

It is not a weakly prime, because it can be changed into another prime (428633059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214316528 + 214316529.

It is an arithmetic number, because the mean of its divisors is an integer number (214316529).

Almost surely, 2^428633057 is an apocalyptic number.

It is an amenable number.

428633057 is a deficient number, since it is larger than the sum of its proper divisors (1).

428633057 is an equidigital number, since it uses as much as digits as its factorization.

428633057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 428633057 is about 20703.4551947253. The cubic root of 428633057 is about 753.9835785273.

The spelling of 428633057 in words is "four hundred twenty-eight million, six hundred thirty-three thousand, fifty-seven".