2188389 has 12 divisors (see below), whose sum is σ = 3394464. Its totient is φ = 1250424.

The previous prime is 2188349. The next prime is 2188409. The reversal of 2188389 is 9838812.

It is not a de Polignac number, because 2188389 - 2⁷ = 2188261 is a prime.

It is a super-3 number, since 3×2188389³ = 31440889487333723607, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188309) 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, 7297 + ... + 7590.

It is an arithmetic number, because the mean of its divisors is an integer number (282872).

2^2188389 is an apocalyptic number.

It is an amenable number.

2188389 is a deficient number, since it is larger than the sum of its proper divisors (1206075).

2188389 is a wasteful number, since it uses less digits than its factorization.

2188389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14904 (or 14897 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 2188389 is about 1479.3204520995. The cubic root of 2188389 is about 129.8299354113.

It can be divided in two parts, 21 and 88389, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 2188389 in words is "two million, one hundred eighty-eight thousand, three hundred eighty-nine".