628425887 has 4 divisors (see below), whose sum is σ = 628967400. Its totient is φ = 627884376.

The previous prime is 628425869. The next prime is 628425923. The reversal of 628425887 is 788524826.

It is a happy number.

628425887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628425887 - 2⁸ = 628425631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628425857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269012 + ... + 271337.

It is an arithmetic number, because the mean of its divisors is an integer number (157241850).

Almost surely, 2^628425887 is an apocalyptic number.

628425887 is a deficient number, since it is larger than the sum of its proper divisors (541513).

628425887 is a wasteful number, since it uses less digits than its factorization.

628425887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541512.

The product of its digits is 1720320, while the sum is 50.

The square root of 628425887 is about 25068.4241028430. The cubic root of 628425887 is about 856.5473101707.

The spelling of 628425887 in words is "six hundred twenty-eight million, four hundred twenty-five thousand, eight hundred eighty-seven".