428306 has 8 divisors (see below), whose sum is σ = 670464. Its totient is φ = 204820.

The previous prime is 428303. The next prime is 428339. The reversal of 428306 is 603824.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (428303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4610 + ... + 4701.

It is an arithmetic number, because the mean of its divisors is an integer number (83808).

2⁴²⁸³⁰⁶ is an apocalyptic number.

428306 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

428306 is a deficient number, since it is larger than the sum of its proper divisors (242158).

428306 is a wasteful number, since it uses less digits than its factorization.

428306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 428306 is about 654.4509148897. The cubic root of 428306 is about 75.3791760725.

The spelling of 428306 in words is "four hundred twenty-eight thousand, three hundred six".