628242885 has 60 divisors (see below), whose sum is σ = 1188852588. Its totient is φ = 317354112.

The previous prime is 628242851. The next prime is 628242889. The reversal of 628242885 is 588242826.

628242885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 280830564 + 347412321 = 16758^2 + 18639^2 .

It is not a de Polignac number, because 628242885 - 2⁶ = 628242821 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 628242885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628242889) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 144057 + ... + 148353.

Almost surely, 2^628242885 is an apocalyptic number.

It is an amenable number.

628242885 is a deficient number, since it is larger than the sum of its proper divisors (560609703).

628242885 is a wasteful number, since it uses less digits than its factorization.

628242885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352 (or 4324 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 628242885 is about 25064.7737871300. The cubic root of 628242885 is about 856.4641579157.

The spelling of 628242885 in words is "six hundred twenty-eight million, two hundred forty-two thousand, eight hundred eighty-five".