428928668 has 24 divisors (see below), whose sum is σ = 866191872. Its totient is φ = 182040624.

The previous prime is 428928641. The next prime is 428928673. The reversal of 428928668 is 866829824.

It is a congruent number.

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, 71480 + ... + 77247.

It is an arithmetic number, because the mean of its divisors is an integer number (36091328).

Almost surely, 2^428928668 is an apocalyptic number.

It is an amenable number.

428928668 is an abundant number, since it is smaller than the sum of its proper divisors (437263204).

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

428928668 is a wasteful number, since it uses less digits than its factorization.

428928668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148841 (or 148839 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The square root of 428928668 is about 20710.5931349153. The cubic root of 428928668 is about 754.1568694243.

The spelling of 428928668 in words is "four hundred twenty-eight million, nine hundred twenty-eight thousand, six hundred sixty-eight".