428281 has 16 divisors (see below), whose sum is σ = 535680. Its totient is φ = 334080.

The previous prime is 428273. The next prime is 428297. The reversal of 428281 is 182824.

It is a cyclic number.

It is not a de Polignac number, because 428281 - 2³ = 428273 is a prime.

It is a super-2 number, since 2×428281² = 366849229922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (33480).

2⁴²⁸²⁸¹ is an apocalyptic number.

It is an amenable number.

428281 is a deficient number, since it is larger than the sum of its proper divisors (107399).

428281 is a wasteful number, since it uses less digits than its factorization.

428281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144.

The product of its digits is 1024, while the sum is 25.

The square root of 428281 is about 654.4318146301. The cubic root of 428281 is about 75.3777094294.

The spelling of 428281 in words is "four hundred twenty-eight thousand, two hundred eighty-one".