428277 has 4 divisors (see below), whose sum is σ = 571040. Its totient is φ = 285516.

The previous prime is 428273. The next prime is 428297. The reversal of 428277 is 772824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 428277 - 2² = 428273 is a prime.

It is a D-number.

It is a Duffinian number.

428277 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71377 + ... + 71382.

It is an arithmetic number, because the mean of its divisors is an integer number (142760).

2⁴²⁸²⁷⁷ is an apocalyptic number.

It is an amenable number.

428277 is a deficient number, since it is larger than the sum of its proper divisors (142763).

428277 is a wasteful number, since it uses less digits than its factorization.

428277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142762.

The product of its digits is 6272, while the sum is 30.

The square root of 428277 is about 654.4287585368. The cubic root of 428277 is about 75.3774747612.

The spelling of 428277 in words is "four hundred twenty-eight thousand, two hundred seventy-seven".