628956 has 18 divisors (see below), whose sum is σ = 1589952. Its totient is φ = 209640.

The previous prime is 628939. The next prime is 628973. The reversal of 628956 is 659826.

628956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (628939) and next prime (628973).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 17471 = 628956 / (6 + 2 + 8 + 9 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 628956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8700 + ... + 8771.

2⁶²⁸⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

628956 is an abundant number, since it is smaller than the sum of its proper divisors (960996).

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

628956 is a wasteful number, since it uses less digits than its factorization.

628956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17481 (or 17476 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 628956 is about 793.0674624520. The cubic root of 628956 is about 85.6788091280.

628956 divided by its sum of digits (36) gives a palindrome (17471).

The spelling of 628956 in words is "six hundred twenty-eight thousand, nine hundred fifty-six".