4185855990 has 96 divisors (see below), whose sum is σ = 11644120800. Its totient is φ = 1040117760.

The previous prime is 4185855983. The next prime is 4185856013. The reversal of 4185855990 is 995585814.

4185855990 is a `hidden beast` number, since 4 + 1 + 8 + 585 + 59 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84246 + ... + 124374.

It is an arithmetic number, because the mean of its divisors is an integer number (121292925).

Almost surely, 2^4185855990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4185855990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5822060400).

4185855990 is an abundant number, since it is smaller than the sum of its proper divisors (7458264810).

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

4185855990 is a wasteful number, since it uses less digits than its factorization.

4185855990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40222 (or 40219 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The square root of 4185855990 is about 64698.1915512327. The cubic root of 4185855990 is about 1611.6154701749.

The spelling of 4185855990 in words is "four billion, one hundred eighty-five million, eight hundred fifty-five thousand, nine hundred ninety".