628618725 has 120 divisors (see below), whose sum is σ = 1354441088. Its totient is φ = 282268800.

The previous prime is 628618709. The next prime is 628618729. The reversal of 628618725 is 527816826.

628618725 is a `hidden beast` number, since 6 + 2 + 8 + 618 + 7 + 25 = 666.

It is not a de Polignac number, because 628618725 - 2⁴ = 628618709 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 (628618729) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 864312 + ... + 865038.

Almost surely, 2^628618725 is an apocalyptic number.

It is an amenable number.

628618725 is an abundant number, since it is smaller than the sum of its proper divisors (725822363).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628618725 is a wasteful number, since it uses less digits than its factorization.

628618725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 803 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 628618725 is about 25072.2700408240. The cubic root of 628618725 is about 856.6349142310.

The spelling of 628618725 in words is "six hundred twenty-eight million, six hundred eighteen thousand, seven hundred twenty-five".