687850828 has 48 divisors (see below), whose sum is σ = 1433779200. Its totient is φ = 288493968.

The previous prime is 687850799. The next prime is 687850841. The reversal of 687850828 is 828058786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59151 + ... + 69817.

It is an arithmetic number, because the mean of its divisors is an integer number (29870400).

Almost surely, 2^687850828 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 687850828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (716889600).

687850828 is an abundant number, since it is smaller than the sum of its proper divisors (745928372).

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

687850828 is a wasteful number, since it uses less digits than its factorization.

687850828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10739 (or 10723 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 52.

The square root of 687850828 is about 26226.9103784643. The cubic root of 687850828 is about 882.7371849747.

The spelling of 687850828 in words is "six hundred eighty-seven million, eight hundred fifty thousand, eight hundred twenty-eight".