628479858 has 16 divisors (see below), whose sum is σ = 1257899616. Its totient is φ = 209336640.

The previous prime is 628479829. The next prime is 628479869. The reversal of 628479858 is 858974826.

It is a junction number, because it is equal to n+sod(n) for n = 628479798 and 628479807.

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, 30316 + ... + 46647.

It is an arithmetic number, because the mean of its divisors is an integer number (78618726).

Almost surely, 2^628479858 is an apocalyptic number.

628479858 is an abundant number, since it is smaller than the sum of its proper divisors (629419758).

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

628479858 is a wasteful number, since it uses less digits than its factorization.

628479858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78329.

The product of its digits is 7741440, while the sum is 57.

The square root of 628479858 is about 25069.5005534614. The cubic root of 628479858 is about 856.5718303740.

The spelling of 628479858 in words is "six hundred twenty-eight million, four hundred seventy-nine thousand, eight hundred fifty-eight".