688348386 has 48 divisors (see below), whose sum is σ = 1664863200. Its totient is φ = 203736960.

The previous prime is 688348361. The next prime is 688348391. The reversal of 688348386 is 683843886.

It is a happy number.

688348386 is a `hidden beast` number, since 6 + 8 + 83 + 483 + 86 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31911 + ... + 48938.

It is an arithmetic number, because the mean of its divisors is an integer number (34684650).

Almost surely, 2^688348386 is an apocalyptic number.

688348386 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

688348386 is an abundant number, since it is smaller than the sum of its proper divisors (976514814).

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

688348386 is a wasteful number, since it uses less digits than its factorization.

688348386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80911 (or 80908 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The square root of 688348386 is about 26236.3943025714. The cubic root of 688348386 is about 882.9499767948.

The spelling of 688348386 in words is "six hundred eighty-eight million, three hundred forty-eight thousand, three hundred eighty-six".