687275244 has 18 divisors (see below), whose sum is σ = 1737279180. Its totient is φ = 229091736.

The previous prime is 687275191. The next prime is 687275257. The reversal of 687275244 is 442572786.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×687275244² = 944694522030519072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 687275244.

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 5 ways as a sum of consecutive naturals, for example, 9545454 + ... + 9545525.

It is an arithmetic number, because the mean of its divisors is an integer number (96515510).

Almost surely, 2^687275244 is an apocalyptic number.

It is an amenable number.

687275244 is an abundant number, since it is smaller than the sum of its proper divisors (1050003936).

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

687275244 is a wasteful number, since it uses less digits than its factorization.

687275244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19090989 (or 19090984 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 687275244 is about 26215.9349251557. The cubic root of 687275244 is about 882.4908955343.

The spelling of 687275244 in words is "six hundred eighty-seven million, two hundred seventy-five thousand, two hundred forty-four".