2188858 has 8 divisors (see below), whose sum is σ = 3752352. Its totient is φ = 938076.

The previous prime is 2188831. The next prime is 2188861. The reversal of 2188858 is 8588812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2188858.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78160 + ... + 78187.

It is an arithmetic number, because the mean of its divisors is an integer number (469044).

2^2188858 is an apocalyptic number.

2188858 is a deficient number, since it is larger than the sum of its proper divisors (1563494).

2188858 is a wasteful number, since it uses less digits than its factorization.

2188858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156356.

The product of its digits is 40960, while the sum is 40.

The square root of 2188858 is about 1479.4789623378. The cubic root of 2188858 is about 129.8392094923.

The spelling of 2188858 in words is "two million, one hundred eighty-eight thousand, eight hundred fifty-eight".