628446925 has 12 divisors (see below), whose sum is σ = 779649876. Its totient is φ = 502515200.

The previous prime is 628446919. The next prime is 628446943. The reversal of 628446925 is 529644826.

It can be written as a sum of positive squares in 6 ways, for example, as 2896804 + 625550121 = 1702^2 + 25011^2 .

It is not a de Polignac number, because 628446925 - 2¹⁹ = 627922637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 61695 + ... + 71155.

It is an arithmetic number, because the mean of its divisors is an integer number (64970823).

Almost surely, 2^628446925 is an apocalyptic number.

It is an amenable number.

628446925 is a deficient number, since it is larger than the sum of its proper divisors (151202951).

628446925 is a wasteful number, since it uses less digits than its factorization.

628446925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12128 (or 12123 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 628446925 is about 25068.8437108695. The cubic root of 628446925 is about 856.5568683602.

The spelling of 628446925 in words is "six hundred twenty-eight million, four hundred forty-six thousand, nine hundred twenty-five".