428826 has 8 divisors (see below), whose sum is σ = 857664. Its totient is φ = 142940.

The previous prime is 428809. The next prime is 428833. The reversal of 428826 is 628824.

428826 = T₁₃₆ + T₁₃₇ + ... + T₁₇₁.

It is a happy number.

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

428826 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 428793 and 428802.

It is a congruent number.

It is an unprimeable number.

428826 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35730 + ... + 35741.

It is an arithmetic number, because the mean of its divisors is an integer number (107208).

2⁴²⁸⁸²⁶ is an apocalyptic number.

428826 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.

428826 is a wasteful number, since it uses less digits than its factorization.

428826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71476.

The product of its digits is 6144, while the sum is 30.

The square root of 428826 is about 654.8480739836. The cubic root of 428826 is about 75.4096693174.

The spelling of 428826 in words is "four hundred twenty-eight thousand, eight hundred twenty-six".