688008078 has 12 divisors (see below), whose sum is σ = 1490684208. Its totient is φ = 229336020.

The previous prime is 688008067. The next prime is 688008089. The reversal of 688008078 is 870800886.

It is an interprime number because it is at equal distance from previous prime (688008067) and next prime (688008089).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19111318 + ... + 19111353.

It is an arithmetic number, because the mean of its divisors is an integer number (124223684).

Almost surely, 2^688008078 is an apocalyptic number.

688008078 is an abundant number, since it is smaller than the sum of its proper divisors (802676130).

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

688008078 is a wasteful number, since it uses less digits than its factorization.

688008078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38222679 (or 38222676 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 688008078 is about 26229.9080821874. The cubic root of 688008078 is about 882.8044475458.

The spelling of 688008078 in words is "six hundred eighty-eight million, eight thousand, seventy-eight".