628425745 has 8 divisors (see below), whose sum is σ = 756834984. Its totient is φ = 500924544.

The previous prime is 628425719. The next prime is 628425841. The reversal of 628425745 is 547524826.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7219969 + 621205776 = 2687^2 + 24924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628425745 - 2¹⁹ = 627901457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225484 + ... + 228253.

It is an arithmetic number, because the mean of its divisors is an integer number (94604373).

Almost surely, 2^628425745 is an apocalyptic number.

It is an amenable number.

628425745 is a deficient number, since it is larger than the sum of its proper divisors (128409239).

628425745 is a wasteful number, since it uses less digits than its factorization.

628425745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454019.

The product of its digits is 537600, while the sum is 43.

The square root of 628425745 is about 25068.4212705946. The cubic root of 628425745 is about 856.5472456551.

The spelling of 628425745 in words is "six hundred twenty-eight million, four hundred twenty-five thousand, seven hundred forty-five".