428015 has 12 divisors (see below), whose sum is σ = 597816. Its totient is φ = 293328.

The previous prime is 428003. The next prime is 428023. The reversal of 428015 is 510824.

It is not a de Polignac number, because 428015 - 2⁶ = 427951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 629 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (49818).

2⁴²⁸⁰¹⁵ is an apocalyptic number.

428015 is a deficient number, since it is larger than the sum of its proper divisors (169801).

428015 is a wasteful number, since it uses less digits than its factorization.

428015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 428015 is about 654.2285533359. The cubic root of 428015 is about 75.3621008117.

Adding to 428015 its reverse (510824), we get a palindrome (938839).

The spelling of 428015 in words is "four hundred twenty-eight thousand, fifteen".