1687276494 has 80 divisors (see below), whose sum is σ = 4108346880. Its totient is φ = 515607120.

The previous prime is 1687276489. The next prime is 1687276561. The reversal of 1687276494 is 4946727861.

1687276494 is a `hidden beast` number, since 1 + 6 + 87 + 2 + 76 + 494 = 666.

1687276494 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 1687276494.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 86577 + ... + 104259.

It is an arithmetic number, because the mean of its divisors is an integer number (51354336).

Almost surely, 2^1687276494 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1687276494, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2054173440).

1687276494 is an abundant number, since it is smaller than the sum of its proper divisors (2421070386).

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

1687276494 is a wasteful number, since it uses less digits than its factorization.

1687276494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17747 (or 17738 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 1687276494 is about 41076.4712944041. The cubic root of 1687276494 is about 1190.4982246318.

The spelling of 1687276494 in words is "one billion, six hundred eighty-seven million, two hundred seventy-six thousand, four hundred ninety-four".