688484445 has 64 divisors (see below), whose sum is σ = 1285300224. Its totient is φ = 310993920.

The previous prime is 688484441. The next prime is 688484471. The reversal of 688484445 is 544484886.

It is not a de Polignac number, because 688484445 - 2² = 688484441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688484441) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 287724 + ... + 290106.

It is an arithmetic number, because the mean of its divisors is an integer number (20082816).

Almost surely, 2^688484445 is an apocalyptic number.

It is an amenable number.

688484445 is a deficient number, since it is larger than the sum of its proper divisors (596815779).

688484445 is a wasteful number, since it uses less digits than its factorization.

688484445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522.

The product of its digits is 3932160, while the sum is 51.

The square root of 688484445 is about 26238.9871184084. The cubic root of 688484445 is about 883.0081476179.

The spelling of 688484445 in words is "six hundred eighty-eight million, four hundred eighty-four thousand, four hundred forty-five".