185385340 has 48 divisors (see below), whose sum is σ = 471102912. Its totient is φ = 59821056.

The previous prime is 185385307. The next prime is 185385349. The reversal of 185385340 is 43583581.

It is a self number, because there is not a number n which added to its sum of digits gives 185385340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185385349) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 36567 + ... + 41326.

It is an arithmetic number, because the mean of its divisors is an integer number (9814644).

Almost surely, 2^185385340 is an apocalyptic number.

185385340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185385340 is an abundant number, since it is smaller than the sum of its proper divisors (285717572).

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

185385340 is a wasteful number, since it uses less digits than its factorization.

185385340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77926 (or 77924 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 185385340 is about 13615.6285201969. The cubic root of 185385340 is about 570.1972642360.

The spelling of 185385340 in words is "one hundred eighty-five million, three hundred eighty-five thousand, three hundred forty".