4181820 has 24 divisors (see below), whose sum is σ = 11709264. Its totient is φ = 1115136.

The previous prime is 4181819. The next prime is 4181839. The reversal of 4181820 is 281814.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34789 + ... + 34908.

It is an arithmetic number, because the mean of its divisors is an integer number (487886).

Almost surely, 2^4181820 is an apocalyptic number.

It is an amenable number.

4181820 is an abundant number, since it is smaller than the sum of its proper divisors (7527444).

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

4181820 is a wasteful number, since it uses less digits than its factorization.

4181820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69709 (or 69707 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 4181820 is about 2044.9498771364. The cubic root of 4181820 is about 161.1097331982.

The spelling of 4181820 in words is "four million, one hundred eighty-one thousand, eight hundred twenty".