428636 has 12 divisors (see below), whose sum is σ = 807912. Its totient is φ = 197808.

The previous prime is 428633. The next prime is 428639. The reversal of 428636 is 636824.

It is an interprime number because it is at equal distance from previous prime (428633) and next prime (428639).

It is a junction number, because it is equal to n+sod(n) for n = 428599 and 428608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4070 + ... + 4173.

It is an arithmetic number, because the mean of its divisors is an integer number (67326).

2⁴²⁸⁶³⁶ is an apocalyptic number.

It is an amenable number.

428636 is a deficient number, since it is larger than the sum of its proper divisors (379276).

428636 is a wasteful number, since it uses less digits than its factorization.

428636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260 (or 8258 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 428636 is about 654.7029860937. The cubic root of 428636 is about 75.3985304144.

The spelling of 428636 in words is "four hundred twenty-eight thousand, six hundred thirty-six".