628887 has 8 divisors (see below), whose sum is σ = 958336. Its totient is φ = 359352.

The previous prime is 628877. The next prime is 628909. The reversal of 628887 is 788826.

628887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 628887 - 2⁷ = 628759 is a prime.

It is a Duffinian number.

628887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14953 + ... + 14994.

It is an arithmetic number, because the mean of its divisors is an integer number (119792).

2⁶²⁸⁸⁸⁷ is an apocalyptic number.

628887 is a deficient number, since it is larger than the sum of its proper divisors (329449).

628887 is a wasteful number, since it uses less digits than its factorization.

628887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29957.

The product of its digits is 43008, while the sum is 39.

The square root of 628887 is about 793.0239592850. The cubic root of 628887 is about 85.6756758648.

The spelling of 628887 in words is "six hundred twenty-eight thousand, eight hundred eighty-seven".