2188449 has 6 divisors (see below), whose sum is σ = 3161106. Its totient is φ = 1458960.

The previous prime is 2188447. The next prime is 2188451. The reversal of 2188449 is 9448812.

It is an interprime number because it is at equal distance from previous prime (2188447) and next prime (2188451).

It can be written as a sum of positive squares in only one way, i.e., 1580049 + 608400 = 1257^2 + 780^2 .

It is not a de Polignac number, because 2188449 - 2¹ = 2188447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2188447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121572 + ... + 121589.

It is an arithmetic number, because the mean of its divisors is an integer number (526851).

2^2188449 is an apocalyptic number.

It is an amenable number.

2188449 is a deficient number, since it is larger than the sum of its proper divisors (972657).

2188449 is a wasteful number, since it uses less digits than its factorization.

2188449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243167 (or 243164 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2188449 is about 1479.3407315423. The cubic root of 2188449 is about 129.8311219348.

The spelling of 2188449 in words is "two million, one hundred eighty-eight thousand, four hundred forty-nine".