188345090 has 8 divisors (see below), whose sum is σ = 339021180. Its totient is φ = 75338032.

The previous prime is 188345077. The next prime is 188345149. The reversal of 188345090 is 90543881.

188345090 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 2 ways, for example, as 183683809 + 4661281 = 13553^2 + 2159^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9417245 + ... + 9417264.

Almost surely, 2^188345090 is an apocalyptic number.

188345090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

188345090 is a deficient number, since it is larger than the sum of its proper divisors (150676090).

188345090 is a wasteful number, since it uses less digits than its factorization.

188345090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18834516.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 188345090 is about 13723.8875687613. The cubic root of 188345090 is about 573.2157317684.

The spelling of 188345090 in words is "one hundred eighty-eight million, three hundred forty-five thousand, ninety".