2189578036 has 12 divisors (see below), whose sum is σ = 4057159428. Its totient is φ = 1030389632.

The previous prime is 2189578007. The next prime is 2189578037. The reversal of 2189578036 is 6308759812.

It can be written as a sum of positive squares in 2 ways, for example, as 1295568036 + 894010000 = 35994^2 + 29900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189578037) 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, 16099771 + ... + 16099906.

It is an arithmetic number, because the mean of its divisors is an integer number (338096619).

Almost surely, 2^2189578036 is an apocalyptic number.

It is an amenable number.

2189578036 is a deficient number, since it is larger than the sum of its proper divisors (1867581392).

2189578036 is a wasteful number, since it uses less digits than its factorization.

2189578036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32199698 (or 32199696 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2189578036 is about 46792.9272005930. The cubic root of 2189578036 is about 1298.5344502143.

The spelling of 2189578036 in words is "two billion, one hundred eighty-nine million, five hundred seventy-eight thousand, thirty-six".