2189578 has 8 divisors (see below), whose sum is σ = 3321540. Its totient is φ = 1082400.

The previous prime is 2189573. The next prime is 2189599. The reversal of 2189578 is 8759812.

It can be written as a sum of positive squares in 2 ways, for example, as 2064969 + 124609 = 1437^2 + 353^2 .

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 2189578.

It is not an unprimeable number, because it can be changed into a prime (2189573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973 + ... + 6328.

2^2189578 is an apocalyptic number.

2189578 is a deficient number, since it is larger than the sum of its proper divisors (1131962).

2189578 is a wasteful number, since it uses less digits than its factorization.

2189578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12392.

The product of its digits is 40320, while the sum is 40.

The square root of 2189578 is about 1479.7222712388. The cubic root of 2189578 is about 129.8534443098.

The spelling of 2189578 in words is "two million, one hundred eighty-nine thousand, five hundred seventy-eight".