188828545 has 4 divisors (see below), whose sum is σ = 226594260. Its totient is φ = 151062832.

The previous prime is 188828543. The next prime is 188828557. The reversal of 188828545 is 545828881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545828881 = 13 ⋅41986837.

It can be written as a sum of positive squares in 2 ways, for example, as 109244304 + 79584241 = 10452^2 + 8921^2 .

It is a cyclic number.

It is not a de Polignac number, because 188828545 - 2¹ = 188828543 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (188828543) by changing a digit.

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, 18882850 + ... + 18882859.

It is an arithmetic number, because the mean of its divisors is an integer number (56648565).

Almost surely, 2^188828545 is an apocalyptic number.

It is an amenable number.

188828545 is a deficient number, since it is larger than the sum of its proper divisors (37765715).

188828545 is an equidigital number, since it uses as much as digits as its factorization.

188828545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37765714.

The product of its digits is 819200, while the sum is 49.

The square root of 188828545 is about 13741.4899119419. The cubic root of 188828545 is about 573.7057670834.

The spelling of 188828545 in words is "one hundred eighty-eight million, eight hundred twenty-eight thousand, five hundred forty-five".