628788707 has 4 divisors (see below), whose sum is σ = 665776296. Its totient is φ = 591801120.

The previous prime is 628788689. The next prime is 628788733. The reversal of 628788707 is 707887826.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628788707 - 2¹⁰ = 628787683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628788757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18493769 + ... + 18493802.

It is an arithmetic number, because the mean of its divisors is an integer number (166444074).

Almost surely, 2^628788707 is an apocalyptic number.

628788707 is a deficient number, since it is larger than the sum of its proper divisors (36987589).

628788707 is a wasteful number, since it uses less digits than its factorization.

628788707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36987588.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The square root of 628788707 is about 25075.6596523402. The cubic root of 628788707 is about 856.7121202211.

The spelling of 628788707 in words is "six hundred twenty-eight million, seven hundred eighty-eight thousand, seven hundred seven".