628885801 has 2 divisors, whose sum is σ = 628885802. Its totient is φ = 628885800.

The previous prime is 628885727. The next prime is 628885841. The reversal of 628885801 is 108588826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612067600 + 16818201 = 24740^2 + 4101^2 .

It is a cyclic number.

It is not a de Polignac number, because 628885801 - 2¹⁵ = 628853033 is a prime.

It is not a weakly prime, because it can be changed into another prime (628885841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314442900 + 314442901.

It is an arithmetic number, because the mean of its divisors is an integer number (314442901).

Almost surely, 2^628885801 is an apocalyptic number.

It is an amenable number.

628885801 is a deficient number, since it is larger than the sum of its proper divisors (1).

628885801 is an equidigital number, since it uses as much as digits as its factorization.

628885801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 46.

The square root of 628885801 is about 25077.5955984620. The cubic root of 628885801 is about 856.7562141669.

The spelling of 628885801 in words is "six hundred twenty-eight million, eight hundred eighty-five thousand, eight hundred one".