628750317 has 8 divisors (see below), whose sum is σ = 902821024. Its totient is φ = 386923248.

The previous prime is 628750273. The next prime is 628750319. The reversal of 628750317 is 713057826.

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

It is a de Polignac number, because none of the positive numbers 2^k-628750317 is a prime.

It is a super-2 number, since 2×628750317² = 790653922255200978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 16121803 = 628750317 / (6 + 2 + 8 + 7 + 5 + 0 + 3 + 1 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628750319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8060863 + ... + 8060940.

It is an arithmetic number, because the mean of its divisors is an integer number (112852628).

Almost surely, 2^628750317 is an apocalyptic number.

It is an amenable number.

628750317 is a deficient number, since it is larger than the sum of its proper divisors (274070707).

628750317 is a wasteful number, since it uses less digits than its factorization.

628750317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16121819.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 628750317 is about 25074.8941573040. The cubic root of 628750317 is about 856.6946846622.

The spelling of 628750317 in words is "six hundred twenty-eight million, seven hundred fifty thousand, three hundred seventeen".