1686518148 has 96 divisors (see below), whose sum is σ = 4718278656. Its totient is φ = 458422272.

The previous prime is 1686518143. The next prime is 1686518161. The reversal of 1686518148 is 8418156861.

It is a junction number, because it is equal to n+sod(n) for n = 1686518097 and 1686518106.

It is not an unprimeable number, because it can be changed into a prime (1686518143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370615 + ... + 375137.

It is an arithmetic number, because the mean of its divisors is an integer number (49148736).

Almost surely, 2^1686518148 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 1686518148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359139328).

1686518148 is an abundant number, since it is smaller than the sum of its proper divisors (3031760508).

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

1686518148 is a wasteful number, since it uses less digits than its factorization.

1686518148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4753 (or 4751 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The square root of 1686518148 is about 41067.2393520675. The cubic root of 1686518148 is about 1190.3198415275.

The spelling of 1686518148 in words is "one billion, six hundred eighty-six million, five hundred eighteen thousand, one hundred forty-eight".