1687448084 has 144 divisors (see below), whose sum is σ = 3851390592. Its totient is φ = 641507328.

The previous prime is 1687448069. The next prime is 1687448123. The reversal of 1687448084 is 4808447861.

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 in 47 ways as a sum of consecutive naturals, for example, 7433579 + ... + 7433805.

It is an arithmetic number, because the mean of its divisors is an integer number (26745768).

Almost surely, 2^1687448084 is an apocalyptic number.

1687448084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1687448084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1925695296).

1687448084 is an abundant number, since it is smaller than the sum of its proper divisors (2163942508).

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

1687448084 is a wasteful number, since it uses less digits than its factorization.

1687448084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 50.

The square root of 1687448084 is about 41078.5599065985. The cubic root of 1687448084 is about 1190.5385797379.

The spelling of 1687448084 in words is "one billion, six hundred eighty-seven million, four hundred forty-eight thousand, eighty-four".