428929 has 4 divisors (see below), whose sum is σ = 437076. Its totient is φ = 420784.

The previous prime is 428899. The next prime is 428951. The reversal of 428929 is 929824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250000 + 178929 = 500^2 + 423^2 .

It is a cyclic number.

It is not a de Polignac number, because 428929 - 2⁷ = 428801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 428894 and 428903.

It is not an unprimeable number, because it can be changed into a prime (428429) 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, 3994 + ... + 4099.

It is an arithmetic number, because the mean of its divisors is an integer number (109269).

2⁴²⁸⁹²⁹ is an apocalyptic number.

It is an amenable number.

428929 is a deficient number, since it is larger than the sum of its proper divisors (8147).

428929 is an equidigital number, since it uses as much as digits as its factorization.

428929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8146.

The product of its digits is 10368, while the sum is 34.

The square root of 428929 is about 654.9267134573. The cubic root of 428929 is about 75.4157064002.

The spelling of 428929 in words is "four hundred twenty-eight thousand, nine hundred twenty-nine".