688814154 has 48 divisors (see below), whose sum is σ = 1708379712. Its totient is φ = 196487424.

The previous prime is 688814149. The next prime is 688814171. The reversal of 688814154 is 451418886.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80737 + ... + 88859.

It is an arithmetic number, because the mean of its divisors is an integer number (35591244).

Almost surely, 2^688814154 is an apocalyptic number.

688814154 is an abundant number, since it is smaller than the sum of its proper divisors (1019565558).

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

688814154 is a wasteful number, since it uses less digits than its factorization.

688814154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811 (or 8808 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 688814154 is about 26245.2691737006. The cubic root of 688814154 is about 883.1490800063.

The spelling of 688814154 in words is "six hundred eighty-eight million, eight hundred fourteen thousand, one hundred fifty-four".