687087324 has 144 divisors (see below), whose sum is σ = 2175054336. Its totient is φ = 177667200.

The previous prime is 687087281. The next prime is 687087337. The reversal of 687087324 is 423780786.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 687087324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 861694 + ... + 862490.

It is an arithmetic number, because the mean of its divisors is an integer number (15104544).

Almost surely, 2^687087324 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 687087324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1087527168).

687087324 is an abundant number, since it is smaller than the sum of its proper divisors (1487967012).

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

687087324 is a wasteful number, since it uses less digits than its factorization.

687087324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 687087324 is about 26212.3506004326. The cubic root of 687087324 is about 882.4104557552.

The spelling of 687087324 in words is "six hundred eighty-seven million, eighty-seven thousand, three hundred twenty-four".