186745340 has 48 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 69645312.

The previous prime is 186745331. The next prime is 186745343. The reversal of 186745340 is 43547681.

It is a junction number, because it is equal to n+sod(n) for n = 186745294 and 186745303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186745343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34541 + ... + 39579.

It is an arithmetic number, because the mean of its divisors is an integer number (8731800).

Almost surely, 2^186745340 is an apocalyptic number.

186745340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186745340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209563200).

186745340 is an abundant number, since it is smaller than the sum of its proper divisors (232381060).

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

186745340 is a wasteful number, since it uses less digits than its factorization.

186745340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 186745340 is about 13665.4798671690. The cubic root of 186745340 is about 571.5882042703.

The spelling of 186745340 in words is "one hundred eighty-six million, seven hundred forty-five thousand, three hundred forty".