687440622 has 16 divisors (see below), whose sum is σ = 1499870592. Its totient is φ = 208315320.

The previous prime is 687440599. The next prime is 687440623. The reversal of 687440622 is 226044786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687440623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5207818 + ... + 5207949.

It is an arithmetic number, because the mean of its divisors is an integer number (93741912).

Almost surely, 2^687440622 is an apocalyptic number.

687440622 is an abundant number, since it is smaller than the sum of its proper divisors (812429970).

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

687440622 is a wasteful number, since it uses less digits than its factorization.

687440622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415783.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 687440622 is about 26219.0888857718. The cubic root of 687440622 is about 882.5616740062.

The spelling of 687440622 in words is "six hundred eighty-seven million, four hundred forty thousand, six hundred twenty-two".