1688870568 has 192 divisors, whose sum is σ = 5341109760. Its totient is φ = 435600000.

The previous prime is 1688870567. The next prime is 1688870639. The reversal of 1688870568 is 8650788861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688870567) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5102163 + ... + 5102493.

It is an arithmetic number, because the mean of its divisors is an integer number (27818280).

Almost surely, 2^1688870568 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 1688870568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2670554880).

1688870568 is an abundant number, since it is smaller than the sum of its proper divisors (3652239192).

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

1688870568 is a wasteful number, since it uses less digits than its factorization.

1688870568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 57.

The square root of 1688870568 is about 41095.8704494746. The cubic root of 1688870568 is about 1190.8730189525.

The spelling of 1688870568 in words is "one billion, six hundred eighty-eight million, eight hundred seventy thousand, five hundred sixty-eight".