130628 has 18 divisors (see below), whose sum is σ = 244986. Its totient is φ = 60928.

The previous prime is 130621. The next prime is 130631. The reversal of 130628 is 826031.

It can be written as a sum of positive squares in 3 ways, for example, as 16384 + 114244 = 128^2 + 338^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (130621) by changing a digit.

130628 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 5 ways as a sum of consecutive naturals, for example, 1100 + ... + 1212.

2¹³⁰⁶²⁸ is an apocalyptic number.

It is an amenable number.

130628 is a deficient number, since it is larger than the sum of its proper divisors (114358).

130628 is a wasteful number, since it uses less digits than its factorization.

130628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 130628 is about 361.4249576330. The cubic root of 130628 is about 50.7394115113.

Adding to 130628 its reverse (826031), we get a palindrome (956659).

The spelling of 130628 in words is "one hundred thirty thousand, six hundred twenty-eight".