2187606204 has 240 divisors, whose sum is σ = 6797683200. Its totient is φ = 600462720.

The previous prime is 2187606203. The next prime is 2187606221. The reversal of 2187606204 is 4026067812.

2187606204 is a `hidden beast` number, since 21 + 8 + 7 + 6 + 0 + 620 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187606203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10992897 + ... + 10993095.

It is an arithmetic number, because the mean of its divisors is an integer number (28323680).

Almost surely, 2^2187606204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2187606204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3398841600).

2187606204 is an abundant number, since it is smaller than the sum of its proper divisors (4610076996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2187606204 is a wasteful number, since it uses less digits than its factorization.

2187606204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 2187606204 is about 46771.8526894114. The cubic root of 2187606204 is about 1298.1445332616.

The spelling of 2187606204 in words is "two billion, one hundred eighty-seven million, six hundred six thousand, two hundred four".