428677 has 2 divisors, whose sum is σ = 428678. Its totient is φ = 428676.

The previous prime is 428671. The next prime is 428683. The reversal of 428677 is 776824.

It is a balanced prime because it is at equal distance from previous prime (428671) and next prime (428683).

It can be written as a sum of positive squares in only one way, i.e., 427716 + 961 = 654^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 428677 - 2¹⁵ = 395909 is a prime.

428677 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214338 + 214339.

It is an arithmetic number, because the mean of its divisors is an integer number (214339).

2⁴²⁸⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

428677 is a deficient number, since it is larger than the sum of its proper divisors (1).

428677 is an equidigital number, since it uses as much as digits as its factorization.

428677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 428677 is about 654.7342972535. The cubic root of 428677 is about 75.4009343509.

The spelling of 428677 in words is "four hundred twenty-eight thousand, six hundred seventy-seven".