1687988316 has 48 divisors (see below), whose sum is σ = 4646512640. Its totient is φ = 466724160.

The previous prime is 1687988299. The next prime is 1687988333. The reversal of 1687988316 is 6138897861.

It is an interprime number because it is at equal distance from previous prime (1687988299) and next prime (1687988333).

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, 321511 + ... + 326718.

Almost surely, 2^1687988316 is an apocalyptic number.

It is an amenable number.

1687988316 is an abundant number, since it is smaller than the sum of its proper divisors (2958524324).

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

1687988316 is a wasteful number, since it uses less digits than its factorization.

1687988316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648274 (or 648272 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 1687988316 is about 41085.1349760470. The cubic root of 1687988316 is about 1190.6656154317.

The spelling of 1687988316 in words is "one billion, six hundred eighty-seven million, nine hundred eighty-eight thousand, three hundred sixteen".