428838 has 8 divisors (see below), whose sum is σ = 857688. Its totient is φ = 142944.

The previous prime is 428833. The next prime is 428843. The reversal of 428838 is 838824.

It is an interprime number because it is at equal distance from previous prime (428833) and next prime (428843).

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

428838 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 428799 and 428808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428833) 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, 35731 + ... + 35742.

It is an arithmetic number, because the mean of its divisors is an integer number (107211).

2⁴²⁸⁸³⁸ is an apocalyptic number.

428838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428838 is a wasteful number, since it uses less digits than its factorization.

428838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71478.

The product of its digits is 12288, while the sum is 33.

The square root of 428838 is about 654.8572363500. The cubic root of 428838 is about 75.4103727166.

The spelling of 428838 in words is "four hundred twenty-eight thousand, eight hundred thirty-eight".