428770 has 16 divisors (see below), whose sum is σ = 787320. Its totient is φ = 168064.

The previous prime is 428759. The next prime is 428777. The reversal of 428770 is 77824.

It can be written as a sum of positive squares in 4 ways, for example, as 421201 + 7569 = 649^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (428777) by changing a digit.

428770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126 + ... + 934.

2⁴²⁸⁷⁷⁰ is an apocalyptic number.

428770 is a deficient number, since it is larger than the sum of its proper divisors (358550).

428770 is a wasteful number, since it uses less digits than its factorization.

428770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869.

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

The square root of 428770 is about 654.8053145783. The cubic root of 428770 is about 75.4063866143.

The spelling of 428770 in words is "four hundred twenty-eight thousand, seven hundred seventy".