168628 has 6 divisors (see below), whose sum is σ = 295106. Its totient is φ = 84312.

The previous prime is 168617. The next prime is 168629. The reversal of 168628 is 826861.

It can be written as a sum of positive squares in only one way, i.e., 121104 + 47524 = 348^2 + 218^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 168628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21075 + ... + 21082.

2¹⁶⁸⁶²⁸ is an apocalyptic number.

It is an amenable number.

168628 is a deficient number, since it is larger than the sum of its proper divisors (126478).

168628 is a wasteful number, since it uses less digits than its factorization.

168628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42161 (or 42159 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 168628 is about 410.6433976092. The cubic root of 168628 is about 55.2471521774.

The spelling of 168628 in words is "one hundred sixty-eight thousand, six hundred twenty-eight".