1688138524 has 36 divisors (see below), whose sum is σ = 3125574648. Its totient is φ = 797680800.

The previous prime is 1688138519. The next prime is 1688138533. The reversal of 1688138524 is 4258318861.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 707814 + ... + 710194.

It is an arithmetic number, because the mean of its divisors is an integer number (86821518).

Almost surely, 2^1688138524 is an apocalyptic number.

It is an amenable number.

1688138524 is a deficient number, since it is larger than the sum of its proper divisors (1437436124).

1688138524 is a wasteful number, since it uses less digits than its factorization.

1688138524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914 (or 2893 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The square root of 1688138524 is about 41086.9629444669. The cubic root of 1688138524 is about 1190.7009320655.

The spelling of 1688138524 in words is "one billion, six hundred eighty-eight million, one hundred thirty-eight thousand, five hundred twenty-four".