628578001 has 2 divisors, whose sum is σ = 628578002. Its totient is φ = 628578000.

The previous prime is 628577993. The next prime is 628578029. The reversal of 628578001 is 100875826.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 547560000 + 81018001 = 23400^2 + 9001^2 .

It is a cyclic number.

It is not a de Polignac number, because 628578001 - 2³ = 628577993 is a prime.

It is a super-2 number, since 2×628578001² = 790220606682312002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628578031) 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 as a sum of consecutive naturals, namely, 314289000 + 314289001.

It is an arithmetic number, because the mean of its divisors is an integer number (314289001).

Almost surely, 2^628578001 is an apocalyptic number.

It is an amenable number.

628578001 is a deficient number, since it is larger than the sum of its proper divisors (1).

628578001 is an equidigital number, since it uses as much as digits as its factorization.

628578001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 628578001 is about 25071.4578953837. The cubic root of 628578001 is about 856.6164152839.

The spelling of 628578001 in words is "six hundred twenty-eight million, five hundred seventy-eight thousand, one".