688466578 has 16 divisors (see below), whose sum is σ = 1099565280. Its totient is φ = 322171456.

The previous prime is 688466573. The next prime is 688466587. The reversal of 688466578 is 875664886.

It is not an unprimeable number, because it can be changed into a prime (688466573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50476 + ... + 62647.

It is an arithmetic number, because the mean of its divisors is an integer number (68722830).

Almost surely, 2^688466578 is an apocalyptic number.

688466578 is a deficient number, since it is larger than the sum of its proper divisors (411098702).

688466578 is a wasteful number, since it uses less digits than its factorization.

688466578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113321.

The product of its digits is 15482880, while the sum is 58.

The square root of 688466578 is about 26238.6466495511. The cubic root of 688466578 is about 883.0005091771. Note that the first 3 decimals are identical.

The spelling of 688466578 in words is "six hundred eighty-eight million, four hundred sixty-six thousand, five hundred seventy-eight".