428885773 has 2 divisors, whose sum is σ = 428885774. Its totient is φ = 428885772.

The previous prime is 428885729. The next prime is 428885783. The reversal of 428885773 is 377588824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347561449 + 81324324 = 18643^2 + 9018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428885773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428885773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428885783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214442886 + 214442887.

It is an arithmetic number, because the mean of its divisors is an integer number (214442887).

Almost surely, 2^428885773 is an apocalyptic number.

It is an amenable number.

428885773 is a deficient number, since it is larger than the sum of its proper divisors (1).

428885773 is an equidigital number, since it uses as much as digits as its factorization.

428885773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3010560, while the sum is 52.

The square root of 428885773 is about 20709.5575278662. The cubic root of 428885773 is about 754.1317287736.

The spelling of 428885773 in words is "four hundred twenty-eight million, eight hundred eighty-five thousand, seven hundred seventy-three".