628566325 has 12 divisors (see below), whose sum is σ = 781172100. Its totient is φ = 501724160.

The previous prime is 628566283. The next prime is 628566331. The reversal of 628566325 is 523665826.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11242609 + 617323716 = 3353^2 + 24846^2 .

It is not a de Polignac number, because 628566325 - 2⁹ = 628565813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16774 + ... + 39223.

It is an arithmetic number, because the mean of its divisors is an integer number (65097675).

Almost surely, 2^628566325 is an apocalyptic number.

It is an amenable number.

628566325 is a deficient number, since it is larger than the sum of its proper divisors (152605775).

628566325 is a wasteful number, since it uses less digits than its factorization.

628566325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56456 (or 56451 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 628566325 is about 25071.2250398739. The cubic root of 628566325 is about 856.6111112935.

The spelling of 628566325 in words is "six hundred twenty-eight million, five hundred sixty-six thousand, three hundred twenty-five".