428224129 has 4 divisors (see below), whose sum is σ = 428265684. Its totient is φ = 428182576.

The previous prime is 428224127. The next prime is 428224151. The reversal of 428224129 is 921422824.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 232867600 + 195356529 = 15260^2 + 13977^2 .

It is a cyclic number.

It is not a de Polignac number, because 428224129 - 2¹ = 428224127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428224094 and 428224103.

It is not an unprimeable number, because it can be changed into a prime (428224127) 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, 7599 + ... + 30235.

It is an arithmetic number, because the mean of its divisors is an integer number (107066421).

Almost surely, 2^428224129 is an apocalyptic number.

It is an amenable number.

428224129 is a deficient number, since it is larger than the sum of its proper divisors (41555).

428224129 is a wasteful number, since it uses less digits than its factorization.

428224129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41554.

The product of its digits is 18432, while the sum is 34.

The square root of 428224129 is about 20693.5769986728. The cubic root of 428224129 is about 753.7437283850.

The spelling of 428224129 in words is "four hundred twenty-eight million, two hundred twenty-four thousand, one hundred twenty-nine".