688055912 has 16 divisors (see below), whose sum is σ = 1331721600. Its totient is φ = 332930160.

The previous prime is 688055887. The next prime is 688055941. The reversal of 688055912 is 219550886.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 1386962 + ... + 1387457.

It is an arithmetic number, because the mean of its divisors is an integer number (83232600).

Almost surely, 2^688055912 is an apocalyptic number.

688055912 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

688055912 is a deficient number, since it is larger than the sum of its proper divisors (643665688).

688055912 is a wasteful number, since it uses less digits than its factorization.

688055912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774456 (or 2774452 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 688055912 is about 26230.8198880630. The cubic root of 688055912 is about 882.8249061667.

The spelling of 688055912 in words is "six hundred eighty-eight million, fifty-five thousand, nine hundred twelve".