1687948368 has 40 divisors (see below), whose sum is σ = 4409539200. Its totient is φ = 556326144.

The previous prime is 1687948363. The next prime is 1687948397. The reversal of 1687948368 is 8638497861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687948363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193288 + ... + 201831.

It is an arithmetic number, because the mean of its divisors is an integer number (110238480).

Almost surely, 2^1687948368 is an apocalyptic number.

It is an amenable number.

1687948368 is an abundant number, since it is smaller than the sum of its proper divisors (2721590832).

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

1687948368 is a wasteful number, since it uses less digits than its factorization.

1687948368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395219 (or 395213 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 60.

The square root of 1687948368 is about 41084.6488119346. The cubic root of 1687948368 is about 1190.6562225773.

The spelling of 1687948368 in words is "one billion, six hundred eighty-seven million, nine hundred forty-eight thousand, three hundred sixty-eight".