688130380 has 24 divisors (see below), whose sum is σ = 1651513248. Its totient is φ = 235930368.

The previous prime is 688130351. The next prime is 688130381. The reversal of 688130380 is 83031886.

It is not an unprimeable number, because it can be changed into a prime (688130381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2457469 + ... + 2457748.

It is an arithmetic number, because the mean of its divisors is an integer number (68813052).

Almost surely, 2^688130380 is an apocalyptic number.

It is an amenable number.

688130380 is an abundant number, since it is smaller than the sum of its proper divisors (963382868).

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

688130380 is a wasteful number, since it uses less digits than its factorization.

688130380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4915233 (or 4915231 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 688130380 is about 26232.2393249223. The cubic root of 688130380 is about 882.8567542731.

The spelling of 688130380 in words is "six hundred eighty-eight million, one hundred thirty thousand, three hundred eighty".