428720798 has 8 divisors (see below), whose sum is σ = 701543160. Its totient is φ = 194873080.

The previous prime is 428720783. The next prime is 428720819. The reversal of 428720798 is 897027824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 9743633 + ... + 9743676.

It is an arithmetic number, because the mean of its divisors is an integer number (87692895).

Almost surely, 2^428720798 is an apocalyptic number.

428720798 is a deficient number, since it is larger than the sum of its proper divisors (272822362).

428720798 is a wasteful number, since it uses less digits than its factorization.

428720798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19487322.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 428720798 is about 20705.5740804258. The cubic root of 428720798 is about 754.0350217206.

The spelling of 428720798 in words is "four hundred twenty-eight million, seven hundred twenty thousand, seven hundred ninety-eight".