687783488 has 112 divisors (see below), whose sum is σ = 1628363520. Its totient is φ = 282003456.

The previous prime is 687783469. The next prime is 687783493. The reversal of 687783488 is 884387786.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×687783488² = 946092252730892288, which contains 22 as substring.

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, 2169506 + ... + 2169822.

It is an arithmetic number, because the mean of its divisors is an integer number (14538960).

Almost surely, 2^687783488 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 687783488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814181760).

687783488 is an abundant number, since it is smaller than the sum of its proper divisors (940580032).

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

687783488 is a wasteful number, since it uses less digits than its factorization.

687783488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 522 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 59.

The square root of 687783488 is about 26225.6265511427. The cubic root of 687783488 is about 882.7083776327.

The spelling of 687783488 in words is "six hundred eighty-seven million, seven hundred eighty-three thousand, four hundred eighty-eight".