185380785 has 16 divisors (see below), whose sum is σ = 329566080. Its totient is φ = 98869680.

The previous prime is 185380781. The next prime is 185380829. The reversal of 185380785 is 587083581.

It is a happy number.

It is not a de Polignac number, because 185380785 - 2² = 185380781 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 185380785.

It is not an unprimeable number, because it can be changed into a prime (185380781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686461 + ... + 686730.

It is an arithmetic number, because the mean of its divisors is an integer number (20597880).

Almost surely, 2^185380785 is an apocalyptic number.

185380785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

185380785 is a deficient number, since it is larger than the sum of its proper divisors (144185295).

185380785 is a wasteful number, since it uses less digits than its factorization.

185380785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373205 (or 1373199 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 185380785 is about 13615.4612481546. The cubic root of 185380785 is about 570.1925941978.

The spelling of 185380785 in words is "one hundred eighty-five million, three hundred eighty thousand, seven hundred eighty-five".