1688868852 has 24 divisors (see below), whose sum is σ = 4298939232. Its totient is φ = 511778400.

The previous prime is 1688868851. The next prime is 1688868931. The reversal of 1688868852 is 2588688861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688868851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6397099 + ... + 6397362.

It is an arithmetic number, because the mean of its divisors is an integer number (179122468).

Almost surely, 2^1688868852 is an apocalyptic number.

1688868852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1688868852 is an abundant number, since it is smaller than the sum of its proper divisors (2610070380).

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

1688868852 is a wasteful number, since it uses less digits than its factorization.

1688868852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794479 (or 12794477 counting only the distinct ones).

The product of its digits is 11796480, while the sum is 60.

The square root of 1688868852 is about 41095.8495714592. The cubic root of 1688868852 is about 1190.8726156181.

Subtracting 1688868852 from its reverse (2588688861), we obtain a square (899820009 = 29997²).

It can be divided in two parts, 1688 and 868852, that added together give a triangular number (870540 = T₁₃₁₉).

The spelling of 1688868852 in words is "one billion, six hundred eighty-eight million, eight hundred sixty-eight thousand, eight hundred fifty-two".