1688363244 has 96 divisors (see below), whose sum is σ = 4457940480. Its totient is φ = 552484800.

The previous prime is 1688363227. The next prime is 1688363249. The reversal of 1688363244 is 4423638861.

1688363244 is a `hidden beast` number, since 1 + 6 + 8 + 8 + 3 + 632 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1688363244.

It is not an unprimeable number, because it can be changed into a prime (1688363249) 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 31 ways as a sum of consecutive naturals, for example, 3227967 + ... + 3228489.

It is an arithmetic number, because the mean of its divisors is an integer number (46436880).

Almost surely, 2^1688363244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1688363244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2228970240).

1688363244 is an abundant number, since it is smaller than the sum of its proper divisors (2769577236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1688363244 is a wasteful number, since it uses less digits than its factorization.

1688363244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 1020 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 1688363244 is about 41089.6975408678. The cubic root of 1688363244 is about 1190.7537639151.

The spelling of 1688363244 in words is "one billion, six hundred eighty-eight million, three hundred sixty-three thousand, two hundred forty-four".