2146820 has 48 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 756096.

The previous prime is 2146817. The next prime is 2146847. The reversal of 2146820 is 286412.

It is a super-2 number, since 2×2146820² = 9217672224800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5801 + ... + 6159.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2^2146820 is an apocalyptic number.

2146820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2146820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

2146820 is an abundant number, since it is smaller than the sum of its proper divisors (2933500).

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

2146820 is a wasteful number, since it uses less digits than its factorization.

2146820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2146820 is about 1465.2030575999. The cubic root of 2146820 is about 129.0026239876.

The spelling of 2146820 in words is "two million, one hundred forty-six thousand, eight hundred twenty".