628070641 has 4 divisors (see below), whose sum is σ = 685167984. Its totient is φ = 570973300.

The previous prime is 628070561. The next prime is 628070647. The reversal of 628070641 is 146070826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 628070641 - 2⁹ = 628070129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628070597 and 628070606.

It is not an unprimeable number, because it can be changed into a prime (628070647) 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, 28548655 + ... + 28548676.

It is an arithmetic number, because the mean of its divisors is an integer number (171291996).

Almost surely, 2^628070641 is an apocalyptic number.

It is an amenable number.

628070641 is a deficient number, since it is larger than the sum of its proper divisors (57097343).

628070641 is a wasteful number, since it uses less digits than its factorization.

628070641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57097342.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 628070641 is about 25061.3375740402. The cubic root of 628070641 is about 856.3858791163.

The spelling of 628070641 in words is "six hundred twenty-eight million, seventy thousand, six hundred forty-one".