1687984460 has 24 divisors (see below), whose sum is σ = 3546335520. Its totient is φ = 674895104.

The previous prime is 1687984429. The next prime is 1687984471. The reversal of 1687984460 is 644897861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30881 + ... + 65799.

It is an arithmetic number, because the mean of its divisors is an integer number (147763980).

Almost surely, 2^1687984460 is an apocalyptic number.

1687984460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1687984460 is an abundant number, since it is smaller than the sum of its proper divisors (1858351060).

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

1687984460 is a wasteful number, since it uses less digits than its factorization.

1687984460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37345 (or 37343 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The square root of 1687984460 is about 41085.0880490720. The cubic root of 1687984460 is about 1190.6647087883.

The spelling of 1687984460 in words is "one billion, six hundred eighty-seven million, nine hundred eighty-four thousand, four hundred sixty".