687732450 has 96 divisors (see below), whose sum is σ = 1814187456. Its totient is φ = 171816960.

The previous prime is 687732449. The next prime is 687732469. The reversal of 687732450 is 54237786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 721174 + ... + 722126.

It is an arithmetic number, because the mean of its divisors is an integer number (18897786).

Almost surely, 2^687732450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687732450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907093728).

687732450 is an abundant number, since it is smaller than the sum of its proper divisors (1126455006).

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

687732450 is a wasteful number, since it uses less digits than its factorization.

687732450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268 (or 1263 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 687732450 is about 26224.6534772149. The cubic root of 687732450 is about 882.6865428619.

The spelling of 687732450 in words is "six hundred eighty-seven million, seven hundred thirty-two thousand, four hundred fifty".