1688241472 has 14 divisors (see below), whose sum is σ = 3350104298. Its totient is φ = 844120704.

The previous prime is 1688241427. The next prime is 1688241473. The reversal of 1688241472 is 2741428861.

It can be written as a sum of positive squares in only one way, i.e., 1652910336 + 35331136 = 40656^2 + 5944^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688241473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13189323 + ... + 13189450.

Almost surely, 2^1688241472 is an apocalyptic number.

It is an amenable number.

1688241472 is a deficient number, since it is larger than the sum of its proper divisors (1661862826).

1688241472 is an equidigital number, since it uses as much as digits as its factorization.

1688241472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26378785 (or 26378775 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 1688241472 is about 41088.2157315209. The cubic root of 1688241472 is about 1190.7251358036.

The spelling of 1688241472 in words is "one billion, six hundred eighty-eight million, two hundred forty-one thousand, four hundred seventy-two".