2221788 has 12 divisors (see below), whose sum is σ = 5184200. Its totient is φ = 740592.

The previous prime is 2221771. The next prime is 2221789. The reversal of 2221788 is 8871222.

It is a happy number.

2221788 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92563 + ... + 92586.

2^2221788 is an apocalyptic number.

It is an amenable number.

2221788 is an abundant number, since it is smaller than the sum of its proper divisors (2962412).

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

2221788 is a wasteful number, since it uses less digits than its factorization.

2221788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185156 (or 185154 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 2221788 is about 1490.5663353236. The cubic root of 2221788 is about 130.4870878727.

The spelling of 2221788 in words is "two million, two hundred twenty-one thousand, seven hundred eighty-eight".