185885145 has 32 divisors (see below), whose sum is σ = 341130240. Its totient is φ = 95938560.

The previous prime is 185885131. The next prime is 185885177. The reversal of 185885145 is 541588581.

185885145 is a `hidden beast` number, since 18 + 588 + 51 + 4 + 5 = 666.

It is not a de Polignac number, because 185885145 - 2⁴ = 185885129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 185885145.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18024 + ... + 26393.

It is an arithmetic number, because the mean of its divisors is an integer number (10660320).

Almost surely, 2^185885145 is an apocalyptic number.

185885145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

185885145 is a deficient number, since it is larger than the sum of its proper divisors (155245095).

185885145 is a wasteful number, since it uses less digits than its factorization.

185885145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44462 (or 44456 counting only the distinct ones).

The product of its digits is 256000, while the sum is 45.

The square root of 185885145 is about 13633.9702581456. The cubic root of 185885145 is about 570.7092279736.

The spelling of 185885145 in words is "one hundred eighty-five million, eight hundred eighty-five thousand, one hundred forty-five".