428707 has 4 divisors (see below), whose sum is σ = 443520. Its totient is φ = 413896.

The previous prime is 428693. The next prime is 428731. The reversal of 428707 is 707824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428707 - 2⁷ = 428579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428777) 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, 7363 + ... + 7420.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2⁴²⁸⁷⁰⁷ is an apocalyptic number.

428707 is a deficient number, since it is larger than the sum of its proper divisors (14813).

428707 is a wasteful number, since it uses less digits than its factorization.

428707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14812.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 428707 is about 654.7572069096. The cubic root of 428707 is about 75.4026932317.

The spelling of 428707 in words is "four hundred twenty-eight thousand, seven hundred seven".