688030130 has 8 divisors (see below), whose sum is σ = 1238454252. Its totient is φ = 275212048.

The previous prime is 688030129. The next prime is 688030159. The reversal of 688030130 is 31030886.

It can be written as a sum of positive squares in 2 ways, for example, as 643180321 + 44849809 = 25361^2 + 6697^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 688030093 and 688030102.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34401497 + ... + 34401516.

Almost surely, 2^688030130 is an apocalyptic number.

688030130 is a deficient number, since it is larger than the sum of its proper divisors (550424122).

688030130 is a wasteful number, since it uses less digits than its factorization.

688030130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68803020.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 688030130 is about 26230.3284386605. The cubic root of 688030130 is about 882.8138793129.

The spelling of 688030130 in words is "six hundred eighty-eight million, thirty thousand, one hundred thirty".