628698 has 16 divisors (see below), whose sum is σ = 1437120. Its totient is φ = 179616.

The previous prime is 628687. The next prime is 628699. The reversal of 628698 is 896826.

It is a super-2 number, since 2×628698² = 790522350408, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628698.

It is not an unprimeable number, because it can be changed into a prime (628699) by changing a digit.

628698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7443 + ... + 7526.

It is an arithmetic number, because the mean of its divisors is an integer number (89820).

2⁶²⁸⁶⁹⁸ is an apocalyptic number.

628698 is an abundant number, since it is smaller than the sum of its proper divisors (808422).

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

628698 is a wasteful number, since it uses less digits than its factorization.

628698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14981.

The product of its digits is 41472, while the sum is 39.

The square root of 628698 is about 792.9047862133. The cubic root of 628698 is about 85.6670922745.

It can be divided in two parts, 628 and 698, that added together give a triangular number (1326 = T₅₁).

The spelling of 628698 in words is "six hundred twenty-eight thousand, six hundred ninety-eight".