686942160 has 40 divisors (see below), whose sum is σ = 2129521440. Its totient is φ = 183184512.

The previous prime is 686942153. The next prime is 686942161. The reversal of 686942160 is 61249686.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686942161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430890 + ... + 1431369.

It is an arithmetic number, because the mean of its divisors is an integer number (53238036).

Almost surely, 2^686942160 is an apocalyptic number.

686942160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686942160 is an abundant number, since it is smaller than the sum of its proper divisors (1442579280).

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

686942160 is a wasteful number, since it uses less digits than its factorization.

686942160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862275 (or 2862269 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 686942160 is about 26209.5814541171. The cubic root of 686942160 is about 882.3483077822.

The spelling of 686942160 in words is "six hundred eighty-six million, nine hundred forty-two thousand, one hundred sixty".