2188908 has 36 divisors (see below), whose sum is σ = 5671848. Its totient is φ = 711360.

The previous prime is 2188877. The next prime is 2188909. The reversal of 2188908 is 8098812.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2188909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 735 + ... + 2217.

2^2188908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2188908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2835924).

2188908 is an abundant number, since it is smaller than the sum of its proper divisors (3482940).

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

2188908 is a wasteful number, since it uses less digits than its factorization.

2188908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1529 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 2188908 is about 1479.4958600821. The cubic root of 2188908 is about 129.8401981221.

The spelling of 2188908 in words is "two million, one hundred eighty-eight thousand, nine hundred eight".