4185820 has 48 divisors (see below), whose sum is σ = 9249408. Its totient is φ = 1589760.

The previous prime is 4185803. The next prime is 4185821. The reversal of 4185820 is 285814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4185821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57304 + ... + 57376.

It is an arithmetic number, because the mean of its divisors is an integer number (192696).

Almost surely, 2^4185820 is an apocalyptic number.

It is an amenable number.

4185820 is an abundant number, since it is smaller than the sum of its proper divisors (5063588).

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

4185820 is a wasteful number, since it uses less digits than its factorization.

4185820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 4185820 is about 2045.9276624553. The cubic root of 4185820 is about 161.1610851270.

It can be divided in two parts, 4185 and 820, that added together give a palindrome (5005).

The spelling of 4185820 in words is "four million, one hundred eighty-five thousand, eight hundred twenty".