2188020 has 24 divisors (see below), whose sum is σ = 6126624. Its totient is φ = 583456.

The previous prime is 2188001. The next prime is 2188031. The reversal of 2188020 is 208812.

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, 18174 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (255276).

2^2188020 is an apocalyptic number.

2188020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2188020 is an abundant number, since it is smaller than the sum of its proper divisors (3938604).

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

2188020 is a wasteful number, since it uses less digits than its factorization.

2188020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36479 (or 36477 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 2188020 is about 1479.1957274141. The cubic root of 2188020 is about 129.8226378149.

The spelling of 2188020 in words is "two million, one hundred eighty-eight thousand, twenty".