628312017 has 16 divisors (see below), whose sum is σ = 856284480. Its totient is φ = 409684800.

The previous prime is 628311989. The next prime is 628312031. The reversal of 628312017 is 710213826.

It is not a de Polignac number, because 628312017 - 2¹⁹ = 627787729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (628312067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23167 + ... + 42347.

It is an arithmetic number, because the mean of its divisors is an integer number (53517780).

Almost surely, 2^628312017 is an apocalyptic number.

It is an amenable number.

628312017 is a deficient number, since it is larger than the sum of its proper divisors (227972463).

628312017 is a wasteful number, since it uses less digits than its factorization.

628312017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19424.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 628312017 is about 25066.1528160984. The cubic root of 628312017 is about 856.4955719382.

The spelling of 628312017 in words is "six hundred twenty-eight million, three hundred twelve thousand, seventeen".