687061508 has 48 divisors (see below), whose sum is σ = 1452124800. Its totient is φ = 277862400.

The previous prime is 687061481. The next prime is 687061517. The reversal of 687061508 is 805160786.

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, 140708 + ... + 145508.

It is an arithmetic number, because the mean of its divisors is an integer number (30252600).

Almost surely, 2^687061508 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 687061508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726062400).

687061508 is an abundant number, since it is smaller than the sum of its proper divisors (765063292).

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

687061508 is a wasteful number, since it uses less digits than its factorization.

687061508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100 (or 5098 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 687061508 is about 26211.8581561857. The cubic root of 687061508 is about 882.3994039850.

The spelling of 687061508 in words is "six hundred eighty-seven million, sixty-one thousand, five hundred eight".