4861820 has 12 divisors (see below), whose sum is σ = 10209864. Its totient is φ = 1944720.

The previous prime is 4861811. The next prime is 4861859. The reversal of 4861820 is 281684.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 121526 + ... + 121565.

It is an arithmetic number, because the mean of its divisors is an integer number (850822).

Almost surely, 2^4861820 is an apocalyptic number.

It is an amenable number.

4861820 is an abundant number, since it is smaller than the sum of its proper divisors (5348044).

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

4861820 is a wasteful number, since it uses less digits than its factorization.

4861820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243100 (or 243098 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 4861820 is about 2204.9535142492. The cubic root of 4861820 is about 169.4076268261.

The spelling of 4861820 in words is "four million, eight hundred sixty-one thousand, eight hundred twenty".