188042945 has 8 divisors (see below), whose sum is σ = 226300200. Its totient is φ = 150001920.

The previous prime is 188042927. The next prime is 188042947. The reversal of 188042945 is 549240881.

188042945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 26142769 + 161900176 = 5113^2 + 12724^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 188042945 - 2²² = 183848641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188042947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52136 + ... + 55625.

It is an arithmetic number, because the mean of its divisors is an integer number (28287525).

Almost surely, 2^188042945 is an apocalyptic number.

It is an amenable number.

188042945 is a deficient number, since it is larger than the sum of its proper divisors (38257255).

188042945 is a wasteful number, since it uses less digits than its factorization.

188042945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108115.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 188042945 is about 13712.8751543941. The cubic root of 188042945 is about 572.9090483233.

The spelling of 188042945 in words is "one hundred eighty-eight million, forty-two thousand, nine hundred forty-five".