628621798 has 8 divisors (see below), whose sum is σ = 1077637392. Its totient is φ = 269409336.

The previous prime is 628621771. The next prime is 628621843. The reversal of 628621798 is 897126826.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22450765 + ... + 22450792.

It is an arithmetic number, because the mean of its divisors is an integer number (134704674).

Almost surely, 2^628621798 is an apocalyptic number.

628621798 is a deficient number, since it is larger than the sum of its proper divisors (449015594).

628621798 is a wasteful number, since it uses less digits than its factorization.

628621798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44901566.

The product of its digits is 580608, while the sum is 49.

The square root of 628621798 is about 25072.3313235925. The cubic root of 628621798 is about 856.6363101141.

The spelling of 628621798 in words is "six hundred twenty-eight million, six hundred twenty-one thousand, seven hundred ninety-eight".