428775860 has 12 divisors (see below), whose sum is σ = 900429348. Its totient is φ = 171510336.

The previous prime is 428775803. The next prime is 428775889. The reversal of 428775860 is 68577824.

It can be written as a sum of positive squares in 2 ways, for example, as 86229796 + 342546064 = 9286^2 + 18508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10719377 + ... + 10719416.

It is an arithmetic number, because the mean of its divisors is an integer number (75035779).

Almost surely, 2^428775860 is an apocalyptic number.

It is an amenable number.

428775860 is an abundant number, since it is smaller than the sum of its proper divisors (471653488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428775860 is a wasteful number, since it uses less digits than its factorization.

428775860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21438802 (or 21438800 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 428775860 is about 20706.9036796910. The cubic root of 428775860 is about 754.0673013917.

The spelling of 428775860 in words is "four hundred twenty-eight million, seven hundred seventy-five thousand, eight hundred sixty".