687346544 has 20 divisors (see below), whose sum is σ = 1332355200. Its totient is φ = 343512960.

The previous prime is 687346537. The next prime is 687346549. The reversal of 687346544 is 445643786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687346549) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 30257 + ... + 47855.

It is an arithmetic number, because the mean of its divisors is an integer number (66617760).

Almost surely, 2^687346544 is an apocalyptic number.

It is an amenable number.

687346544 is a deficient number, since it is larger than the sum of its proper divisors (645008656).

687346544 is a wasteful number, since it uses less digits than its factorization.

687346544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20048 (or 20042 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 47.

The square root of 687346544 is about 26217.2947498402. The cubic root of 687346544 is about 882.5214118985.

The spelling of 687346544 in words is "six hundred eighty-seven million, three hundred forty-six thousand, five hundred forty-four".