628428317 has 8 divisors (see below), whose sum is σ = 686093760. Its totient is φ = 570852160.

The previous prime is 628428299. The next prime is 628428319. The reversal of 628428317 is 713824826.

628428317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 628428317 - 2¹⁶ = 628362781 is a prime.

It is a super-4 number, since 4×628428317⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628428319) 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, 7148 + ... + 36165.

It is an arithmetic number, because the mean of its divisors is an integer number (85761720).

Almost surely, 2^628428317 is an apocalyptic number.

It is an amenable number.

628428317 is a deficient number, since it is larger than the sum of its proper divisors (57665443).

628428317 is a wasteful number, since it uses less digits than its factorization.

628428317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44643.

The product of its digits is 129024, while the sum is 41.

The square root of 628428317 is about 25068.4725701428. The cubic root of 628428317 is about 856.5484142029.

The spelling of 628428317 in words is "six hundred twenty-eight million, four hundred twenty-eight thousand, three hundred seventeen".