1688194268 has 6 divisors (see below), whose sum is σ = 2954339976. Its totient is φ = 844097132.

The previous prime is 1688194247. The next prime is 1688194271. The reversal of 1688194268 is 8624918861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211024280 + ... + 211024287.

It is an arithmetic number, because the mean of its divisors is an integer number (492389996).

Almost surely, 2^1688194268 is an apocalyptic number.

It is an amenable number.

1688194268 is a deficient number, since it is larger than the sum of its proper divisors (1266145708).

1688194268 is a wasteful number, since it uses less digits than its factorization.

1688194268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422048571 (or 422048569 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 53.

The square root of 1688194268 is about 41087.6413048985. The cubic root of 1688194268 is about 1190.7140379612.

The spelling of 1688194268 in words is "one billion, six hundred eighty-eight million, one hundred ninety-four thousand, two hundred sixty-eight".