628829 has 4 divisors (see below), whose sum is σ = 630720. Its totient is φ = 626940.

The previous prime is 628819. The next prime is 628841. The reversal of 628829 is 928826.

628829 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 928826 = 2 ⋅464413.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628829 is a prime.

It is a super-2 number, since 2×628829² = 790851822482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628819) 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, 299 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (157680).

2⁶²⁸⁸²⁹ is an apocalyptic number.

It is an amenable number.

628829 is a deficient number, since it is larger than the sum of its proper divisors (1891).

628829 is a wasteful number, since it uses less digits than its factorization.

628829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890.

The product of its digits is 13824, while the sum is 35.

The square root of 628829 is about 792.9873895593. The cubic root of 628829 is about 85.6730419301.

The spelling of 628829 in words is "six hundred twenty-eight thousand, eight hundred twenty-nine".