428648860 has 12 divisors (see below), whose sum is σ = 900162648. Its totient is φ = 171459536.

The previous prime is 428648849. The next prime is 428648881. The reversal of 428648860 is 68846824.

It is a self number, because there is not a number n which added to its sum of digits gives 428648860.

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, 10716202 + ... + 10716241.

It is an arithmetic number, because the mean of its divisors is an integer number (75013554).

Almost surely, 2^428648860 is an apocalyptic number.

It is an amenable number.

428648860 is an abundant number, since it is smaller than the sum of its proper divisors (471513788).

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

428648860 is a wasteful number, since it uses less digits than its factorization.

428648860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21432452 (or 21432450 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 46.

The square root of 428648860 is about 20703.8368424792. The cubic root of 428648860 is about 753.9928444607.

The spelling of 428648860 in words is "four hundred twenty-eight million, six hundred forty-eight thousand, eight hundred sixty".