688486645 has 64 divisors (see below), whose sum is σ = 1060024320. Its totient is φ = 416908800.

The previous prime is 688486571. The next prime is 688486661. The reversal of 688486645 is 546684886.

688486645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688486645 - 2⁹ = 688486133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2432674 + ... + 2432956.

It is an arithmetic number, because the mean of its divisors is an integer number (16562880).

Almost surely, 2^688486645 is an apocalyptic number.

It is an amenable number.

688486645 is a deficient number, since it is larger than the sum of its proper divisors (371537675).

688486645 is a wasteful number, since it uses less digits than its factorization.

688486645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466.

The product of its digits is 8847360, while the sum is 55.

The square root of 688486645 is about 26239.0290407248. The cubic root of 688486645 is about 883.0090881455.

The spelling of 688486645 in words is "six hundred eighty-eight million, four hundred eighty-six thousand, six hundred forty-five".