428668 has 12 divisors (see below), whose sum is σ = 774592. Its totient is φ = 207360.

The previous prime is 428663. The next prime is 428671. The reversal of 428668 is 866824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428663) 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, 1605 + ... + 1852.

2⁴²⁸⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

428668 is a deficient number, since it is larger than the sum of its proper divisors (345924).

428668 is a wasteful number, since it uses less digits than its factorization.

428668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492 (or 3490 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 428668 is about 654.7274242003. The cubic root of 428668 is about 75.4004066706.

The spelling of 428668 in words is "four hundred twenty-eight thousand, six hundred sixty-eight".