2188228 has 24 divisors (see below), whose sum is σ = 4519424. Its totient is φ = 907200.

The previous prime is 2188213. The next prime is 2188231. The reversal of 2188228 is 8228812.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 2188228.

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, 393 + ... + 2128.

2^2188228 is an apocalyptic number.

2188228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2188228 is an abundant number, since it is smaller than the sum of its proper divisors (2331196).

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

2188228 is a wasteful number, since it uses less digits than its factorization.

2188228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563 (or 2561 counting only the distinct ones).

The product of its digits is 4096, while the sum is 31.

The square root of 2188228 is about 1479.2660342210. The cubic root of 2188228 is about 129.8267514661.

The spelling of 2188228 in words is "two million, one hundred eighty-eight thousand, two hundred twenty-eight".