1687851048 has 128 divisors (see below), whose sum is σ = 4736793600. Its totient is φ = 497664000.

The previous prime is 1687851047. The next prime is 1687851101. The reversal of 1687851048 is 8401587861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1687850988 and 1687851006.

It is not an unprimeable number, because it can be changed into a prime (1687851047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1053448 + ... + 1055048.

It is an arithmetic number, because the mean of its divisors is an integer number (37006200).

Almost surely, 2^1687851048 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 1687851048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2368396800).

1687851048 is an abundant number, since it is smaller than the sum of its proper divisors (3048942552).

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

1687851048 is a wasteful number, since it uses less digits than its factorization.

1687851048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763 (or 1759 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 48.

The square root of 1687851048 is about 41083.4644108795. The cubic root of 1687851048 is about 1190.6333393950.

The spelling of 1687851048 in words is "one billion, six hundred eighty-seven million, eight hundred fifty-one thousand, forty-eight".