187830728 has 16 divisors (see below), whose sum is σ = 358828380. Its totient is φ = 92143168.

The previous prime is 187830707. The next prime is 187830757. The reversal of 187830728 is 827038781.

It can be written as a sum of positive squares in 2 ways, for example, as 187087684 + 743044 = 13678^2 + 862^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221075 + ... + 221922.

Almost surely, 2^187830728 is an apocalyptic number.

It is an amenable number.

187830728 is a deficient number, since it is larger than the sum of its proper divisors (170997652).

187830728 is a wasteful number, since it uses less digits than its factorization.

187830728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443056 (or 443052 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 187830728 is about 13705.1350960142. The cubic root of 187830728 is about 572.6934472094.

The spelling of 187830728 in words is "one hundred eighty-seven million, eight hundred thirty thousand, seven hundred twenty-eight".