1688241457 has 32 divisors (see below), whose sum is σ = 2101248000. Its totient is φ = 1323475200.

The previous prime is 1688241427. The next prime is 1688241473. The reversal of 1688241457 is 7541428861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1688241457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688241407) 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 31 ways as a sum of consecutive naturals, for example, 843544 + ... + 845542.

It is an arithmetic number, because the mean of its divisors is an integer number (65664000).

Almost surely, 2^1688241457 is an apocalyptic number.

1688241457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1688241457 is a deficient number, since it is larger than the sum of its proper divisors (413006543).

1688241457 is a wasteful number, since it uses less digits than its factorization.

1688241457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221.

The product of its digits is 430080, while the sum is 46.

The square root of 1688241457 is about 41088.2155489868. The cubic root of 1688241457 is about 1190.7251322771.

The spelling of 1688241457 in words is "one billion, six hundred eighty-eight million, two hundred forty-one thousand, four hundred fifty-seven".