628917525 has 18 divisors (see below), whose sum is σ = 1126461570. Its totient is φ = 335422560.

The previous prime is 628917517. The next prime is 628917529. The reversal of 628917525 is 525719826.

628917525 is a `hidden beast` number, since 628 + 9 + 17 + 5 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 152324964 + 476592561 = 12342^2 + 21831^2 .

It is not a de Polignac number, because 628917525 - 2³ = 628917517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628917529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1397370 + ... + 1397819.

Almost surely, 2^628917525 is an apocalyptic number.

It is an amenable number.

628917525 is a deficient number, since it is larger than the sum of its proper divisors (497544045).

628917525 is a wasteful number, since it uses less digits than its factorization.

628917525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795205 (or 2795197 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 628917525 is about 25078.2281072647. The cubic root of 628917525 is about 856.7706202149.

The spelling of 628917525 in words is "six hundred twenty-eight million, nine hundred seventeen thousand, five hundred twenty-five".