428869 has 8 divisors (see below), whose sum is σ = 494208. Its totient is φ = 364560.

The previous prime is 428863. The next prime is 428873. The reversal of 428869 is 968824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428869 - 2⁷ = 428741 is a prime.

It is a super-2 number, since 2×428869² = 367857238322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1224 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (61776).

2⁴²⁸⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

428869 is a deficient number, since it is larger than the sum of its proper divisors (65339).

428869 is a wasteful number, since it uses less digits than its factorization.

428869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 27648, while the sum is 37.

The square root of 428869 is about 654.8809052034. The cubic root of 428869 is about 75.4121897705.

It can be divided in two parts, 42 and 8869, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 428869 in words is "four hundred twenty-eight thousand, eight hundred sixty-nine".