687148 has 48 divisors (see below), whose sum is σ = 1580544. Its totient is φ = 253440.

The previous prime is 687139. The next prime is 687151. The reversal of 687148 is 841786.

It is a happy number.

687148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

687148 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7036 + ... + 7132.

It is an arithmetic number, because the mean of its divisors is an integer number (32928).

2⁶⁸⁷¹⁴⁸ 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 687148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790272).

687148 is an abundant number, since it is smaller than the sum of its proper divisors (893396).

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

687148 is a wasteful number, since it uses less digits than its factorization.

687148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 140 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 687148 is about 828.9439064255. The cubic root of 687148 is about 88.2436429921.

The spelling of 687148 in words is "six hundred eighty-seven thousand, one hundred forty-eight".