428777 has 2 divisors, whose sum is σ = 428778. Its totient is φ = 428776.

The previous prime is 428759. The next prime is 428797. The reversal of 428777 is 777824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249001 + 179776 = 499^2 + 424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428777 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 4⁹ + 2¹⁷ + 7² + 8⁵ + 7³ + 7⁴ .

It is not a weakly prime, because it can be changed into another prime (428797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214388 + 214389.

It is an arithmetic number, because the mean of its divisors is an integer number (214389).

2⁴²⁸⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

428777 is a deficient number, since it is larger than the sum of its proper divisors (1).

428777 is an equidigital number, since it uses as much as digits as its factorization.

428777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21952, while the sum is 35.

The square root of 428777 is about 654.8106596567. The cubic root of 428777 is about 75.4067969679.

The spelling of 428777 in words is "four hundred twenty-eight thousand, seven hundred seventy-seven".