1688688336 has 80 divisors (see below), whose sum is σ = 4819941504. Its totient is φ = 506744832.

The previous prime is 1688688317. The next prime is 1688688349. The reversal of 1688688336 is 6338868861.

It is a happy number.

It is a super-2 number, since 2×1688688336² = 5703336592284897792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26221 + ... + 63756.

Almost surely, 2^1688688336 is an apocalyptic number.

1688688336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1688688336 is an abundant number, since it is smaller than the sum of its proper divisors (3131253168).

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

1688688336 is a wasteful number, since it uses less digits than its factorization.

1688688336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90028 (or 90022 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 1688688336 is about 41093.6532325857. The cubic root of 1688688336 is about 1190.8301850054.

The spelling of 1688688336 in words is "one billion, six hundred eighty-eight million, six hundred eighty-eight thousand, three hundred thirty-six".