2188731204 has 36 divisors (see below), whose sum is σ = 6035593200. Its totient is φ = 663251760.

The previous prime is 2188731137. The next prime is 2188731217. The reversal of 2188731204 is 4021378812.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-4 number, since 4×2188731204⁴ (a number of 38 digits) contains 4444 as substring.

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

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2763154 + ... + 2763945.

Almost surely, 2^2188731204 is an apocalyptic number.

It is an amenable number.

2188731204 is an abundant number, since it is smaller than the sum of its proper divisors (3846861996).

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

2188731204 is a wasteful number, since it uses less digits than its factorization.

2188731204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5527120 (or 5527115 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2188731204 is about 46783.8776075690. The cubic root of 2188731204 is about 1298.3670233857.

The spelling of 2188731204 in words is "two billion, one hundred eighty-eight million, seven hundred thirty-one thousand, two hundred four".