687054544 has 80 divisors (see below), whose sum is σ = 1511421120. Its totient is φ = 299694080.

The previous prime is 687054539. The next prime is 687054569. The reversal of 687054544 is 445450786.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 687054544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1158312 + ... + 1158904.

It is an arithmetic number, because the mean of its divisors is an integer number (18892764).

Almost surely, 2^687054544 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 687054544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755710560).

687054544 is an abundant number, since it is smaller than the sum of its proper divisors (824366576).

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

687054544 is a wasteful number, since it uses less digits than its factorization.

687054544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 43.

The square root of 687054544 is about 26211.7253152096. The cubic root of 687054544 is about 882.3964226653.

The spelling of 687054544 in words is "six hundred eighty-seven million, fifty-four thousand, five hundred forty-four".