186945680 has 20 divisors (see below), whose sum is σ = 434648892. Its totient is φ = 74778240.

The previous prime is 186945677. The next prime is 186945751. The reversal of 186945680 is 86549681.

It can be written as a sum of positive squares in 2 ways, for example, as 21977344 + 164968336 = 4688^2 + 12844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1168331 + ... + 1168490.

Almost surely, 2^186945680 is an apocalyptic number.

186945680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

186945680 is an abundant number, since it is smaller than the sum of its proper divisors (247703212).

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

186945680 is a wasteful number, since it uses less digits than its factorization.

186945680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336834 (or 2336828 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 186945680 is about 13672.8080510186. The cubic root of 186945680 is about 571.7925307536.

The spelling of 186945680 in words is "one hundred eighty-six million, nine hundred forty-five thousand, six hundred eighty".