1687481004 has 72 divisors (see below), whose sum is σ = 4362502144. Its totient is φ = 507276000.

The previous prime is 1687480987. The next prime is 1687481009. The reversal of 1687481004 is 4001847861.

It is not an unprimeable number, because it can be changed into a prime (1687481009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179829 + ... + 188979.

Almost surely, 2^1687481004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1687481004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2181251072).

1687481004 is an abundant number, since it is smaller than the sum of its proper divisors (2675021140).

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

1687481004 is a wasteful number, since it uses less digits than its factorization.

1687481004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9307 (or 9294 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1687481004 is about 41078.9606002878. The cubic root of 1687481004 is about 1190.5463216601.

The spelling of 1687481004 in words is "one billion, six hundred eighty-seven million, four hundred eighty-one thousand, four".