428386 has 16 divisors (see below), whose sum is σ = 755136. Its totient is φ = 178416.

The previous prime is 428369. The next prime is 428401. The reversal of 428386 is 683824.

It is a happy number.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105 + ... + 931.

It is an arithmetic number, because the mean of its divisors is an integer number (47196).

2⁴²⁸³⁸⁶ is an apocalyptic number.

428386 is a deficient number, since it is larger than the sum of its proper divisors (326750).

428386 is a wasteful number, since it uses less digits than its factorization.

428386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873.

The product of its digits is 9216, while the sum is 31.

The square root of 428386 is about 654.5120319750. The cubic root of 428386 is about 75.3838689468.

The spelling of 428386 in words is "four hundred twenty-eight thousand, three hundred eighty-six".