628117020 has 72 divisors (see below), whose sum is σ = 2017373904. Its totient is φ = 157644288.

The previous prime is 628116997. The next prime is 628117031. The reversal of 628117020 is 20711826.

628117020 is a `hidden beast` number, since 628 + 1 + 17 + 0 + 20 = 666.

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 23 ways as a sum of consecutive naturals, for example, 99574 + ... + 105693.

It is an arithmetic number, because the mean of its divisors is an integer number (28019082).

Almost surely, 2^628117020 is an apocalyptic number.

628117020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628117020 is an abundant number, since it is smaller than the sum of its proper divisors (1389256884).

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

628117020 is a wasteful number, since it uses less digits than its factorization.

628117020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205299 (or 205294 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 628117020 is about 25062.2628667086. The cubic root of 628117020 is about 856.4069581375.

Adding to 628117020 its reverse (20711826), we get a palindrome (648828846).

The spelling of 628117020 in words is "six hundred twenty-eight million, one hundred seventeen thousand, twenty".