185385320 has 16 divisors (see below), whose sum is σ = 417117060. Its totient is φ = 74154112.

The previous prime is 185385307. The next prime is 185385349. The reversal of 185385320 is 23583581.

It can be written as a sum of positive squares in 2 ways, for example, as 182844484 + 2540836 = 13522^2 + 1594^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2317277 + ... + 2317356.

Almost surely, 2^185385320 is an apocalyptic number.

185385320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185385320 is an abundant number, since it is smaller than the sum of its proper divisors (231731740).

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

185385320 is a wasteful number, since it uses less digits than its factorization.

185385320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4634644 (or 4634640 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 185385320 is about 13615.6277857468. The cubic root of 185385320 is about 570.1972437310.

The spelling of 185385320 in words is "one hundred eighty-five million, three hundred eighty-five thousand, three hundred twenty".