687418434 has 64 divisors (see below), whose sum is σ = 1600300800. Its totient is φ = 218313216.

The previous prime is 687418429. The next prime is 687418447. The reversal of 687418434 is 434814786.

It is a self number, because there is not a number n which added to its sum of digits gives 687418434.

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 31 ways as a sum of consecutive naturals, for example, 362962 + ... + 364850.

It is an arithmetic number, because the mean of its divisors is an integer number (25004700).

Almost surely, 2^687418434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687418434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800150400).

687418434 is an abundant number, since it is smaller than the sum of its proper divisors (912882366).

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

687418434 is a wasteful number, since it uses less digits than its factorization.

687418434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2210 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 687418434 is about 26218.6657555262. The cubic root of 687418434 is about 882.5521786459.

The spelling of 687418434 in words is "six hundred eighty-seven million, four hundred eighteen thousand, four hundred thirty-four".