186428268 has 72 divisors (see below), whose sum is σ = 509182128. Its totient is φ = 57172608.

The previous prime is 186428251. The next prime is 186428287. The reversal of 186428268 is 862824681.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218130 + ... + 218982.

It is an arithmetic number, because the mean of its divisors is an integer number (7071974).

Almost surely, 2^186428268 is an apocalyptic number.

186428268 is a gapful number since it is divisible by the number (18) 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 186428268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254591064).

186428268 is an abundant number, since it is smaller than the sum of its proper divisors (322753860).

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

186428268 is a wasteful number, since it uses less digits than its factorization.

186428268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1338 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 186428268 is about 13653.8737360501. The cubic root of 186428268 is about 571.2645241117.

The spelling of 186428268 in words is "one hundred eighty-six million, four hundred twenty-eight thousand, two hundred sixty-eight".