1688927172 has 48 divisors (see below), whose sum is σ = 4081929600. Its totient is φ = 542868480.

The previous prime is 1688927167. The next prime is 1688927183. The reversal of 1688927172 is 2717298861.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 317172 + ... + 322452.

It is an arithmetic number, because the mean of its divisors is an integer number (85040200).

Almost surely, 2^1688927172 is an apocalyptic number.

1688927172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1688927172 is an abundant number, since it is smaller than the sum of its proper divisors (2393002428).

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

1688927172 is a wasteful number, since it uses less digits than its factorization.

1688927172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6236 (or 6234 counting only the distinct ones).

The product of its digits is 677376, while the sum is 51.

The square root of 1688927172 is about 41096.5591260388. The cubic root of 1688927172 is about 1190.8863231935.

The spelling of 1688927172 in words is "one billion, six hundred eighty-eight million, nine hundred twenty-seven thousand, one hundred seventy-two".