185000000 has 112 divisors (see below), whose sum is σ = 471287856. Its totient is φ = 72000000.

The previous prime is 184999999. The next prime is 185000009. The reversal of 185000000 is 581.

It can be written as a sum of positive squares in 8 ways, for example, as 171924544 + 13075456 = 13112^2 + 3616^2 .

It is not an unprimeable number, because it can be changed into a prime (185000009) 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, 4999982 + ... + 5000018.

Almost surely, 2^185000000 is an apocalyptic number.

185000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 185000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235643928).

185000000 is an abundant number, since it is smaller than the sum of its proper divisors (286287856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

185000000 is an frugal number, since it uses more digits than its factorization.

185000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 185000000 is about 13601.4705087354. The cubic root of 185000000 is about 569.8019215305.

Adding to 185000000 its reverse (581), we get a palindrome (185000581).

The spelling of 185000000 in words is "one hundred eighty-five million", and thus it is an aban number.