687424100 has 72 divisors (see below), whose sum is σ = 1635082848. Its totient is φ = 248780800.

The previous prime is 687424099. The next prime is 687424117. The reversal of 687424100 is 1424786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248324 + ... + 251076.

It is an arithmetic number, because the mean of its divisors is an integer number (22709484).

Almost surely, 2^687424100 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 687424100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817541424).

687424100 is an abundant number, since it is smaller than the sum of its proper divisors (947658748).

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

687424100 is a wasteful number, since it uses less digits than its factorization.

687424100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005 (or 2998 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 687424100 is about 26218.7738080941. The cubic root of 687424100 is about 882.5546034315.

Adding to 687424100 its reverse (1424786), we get a palindrome (688848886).

The spelling of 687424100 in words is "six hundred eighty-seven million, four hundred twenty-four thousand, one hundred".