628880555 has 8 divisors (see below), whose sum is σ = 754808544. Its totient is φ = 503003200.

The previous prime is 628880543. The next prime is 628880561. The reversal of 628880555 is 555088826.

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

It is not a de Polignac number, because 628880555 - 2⁶ = 628880491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24695 + ... + 43215.

It is an arithmetic number, because the mean of its divisors is an integer number (94351068).

Almost surely, 2^628880555 is an apocalyptic number.

628880555 is a deficient number, since it is larger than the sum of its proper divisors (125927989).

628880555 is a wasteful number, since it uses less digits than its factorization.

628880555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25317.

The product of its (nonzero) digits is 768000, while the sum is 47.

The square root of 628880555 is about 25077.4910028894. The cubic root of 628880555 is about 856.7538318819.

The spelling of 628880555 in words is "six hundred twenty-eight million, eight hundred eighty thousand, five hundred fifty-five".