428607 has 6 divisors (see below), whose sum is σ = 619112. Its totient is φ = 285732.

The previous prime is 428579. The next prime is 428629. The reversal of 428607 is 706824.

It is a de Polignac number, because none of the positive numbers 2^k-428607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428657) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 23803 + ... + 23820.

2⁴²⁸⁶⁰⁷ is an apocalyptic number.

428607 is a deficient number, since it is larger than the sum of its proper divisors (190505).

428607 is a wasteful number, since it uses less digits than its factorization.

428607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47629 (or 47626 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 428607 is about 654.6808382716. The cubic root of 428607 is about 75.3968299765.

It can be divided in two parts, 428 and 607, that added together give a triangular number (1035 = T₄₅).

The spelling of 428607 in words is "four hundred twenty-eight thousand, six hundred seven".