428012 has 12 divisors (see below), whose sum is σ = 806736. Its totient is φ = 197520.

The previous prime is 428003. The next prime is 428023. The reversal of 428012 is 210824.

It is an Ulam number.

It is an unprimeable number.

428012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4064 + ... + 4167.

It is an arithmetic number, because the mean of its divisors is an integer number (67228).

2⁴²⁸⁰¹² is an apocalyptic number.

It is an amenable number.

428012 is a deficient number, since it is larger than the sum of its proper divisors (378724).

428012 is a wasteful number, since it uses less digits than its factorization.

428012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8248 (or 8246 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 428012 is about 654.2262605552. The cubic root of 428012 is about 75.3619247378.

Adding to 428012 its reverse (210824), we get a palindrome (638836).

It can be divided in two parts, 4280 and 12, that multiplied together give a triangular number (51360 = T₃₂₀).

The spelling of 428012 in words is "four hundred twenty-eight thousand, twelve".