628516685 has 8 divisors (see below), whose sum is σ = 754871136. Its totient is φ = 502379280.

The previous prime is 628516663. The next prime is 628516697. The reversal of 628516685 is 586615826.

It is a happy number.

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

It is not a de Polignac number, because 628516685 - 2⁶ = 628516621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47819 + ... + 59528.

It is an arithmetic number, because the mean of its divisors is an integer number (94358892).

Almost surely, 2^628516685 is an apocalyptic number.

It is an amenable number.

628516685 is a deficient number, since it is larger than the sum of its proper divisors (126354451).

628516685 is a wasteful number, since it uses less digits than its factorization.

628516685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108523.

The product of its digits is 691200, while the sum is 47.

The square root of 628516685 is about 25070.2350407809. The cubic root of 628516685 is about 856.5885608782.

The spelling of 628516685 in words is "six hundred twenty-eight million, five hundred sixteen thousand, six hundred eighty-five".