628716 has 36 divisors (see below), whose sum is σ = 1616216. Its totient is φ = 190080.

The previous prime is 628709. The next prime is 628721. The reversal of 628716 is 617826.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1236 + ... + 1668.

2⁶²⁸⁷¹⁶ is an apocalyptic number.

628716 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808108).

628716 is an abundant number, since it is smaller than the sum of its proper divisors (987500).

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

628716 is a wasteful number, since it uses less digits than its factorization.

628716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462 (or 449 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 628716 is about 792.9161368014. The cubic root of 628716 is about 85.6679098334.

It can be divided in two parts, 62 and 8716, that added together give a palindrome (8778).

The spelling of 628716 in words is "six hundred twenty-eight thousand, seven hundred sixteen".