2188558404 has 36 divisors (see below), whose sum is σ = 5544180096. Its totient is φ = 727938288.

The previous prime is 2188558403. The next prime is 2188558439. The reversal of 2188558404 is 4048558812.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2188558404.

It is not an unprimeable number, because it can be changed into a prime (2188558403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48984 + ... + 82319.

Almost surely, 2^2188558404 is an apocalyptic number.

It is an amenable number.

2188558404 is an abundant number, since it is smaller than the sum of its proper divisors (3355621692).

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

2188558404 is a wasteful number, since it uses less digits than its factorization.

2188558404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131776 (or 131771 counting only the distinct ones).

The product of its (nonzero) digits is 409600, while the sum is 45.

The square root of 2188558404 is about 46782.0307810595. The cubic root of 2188558404 is about 1298.3328538592.

The spelling of 2188558404 in words is "two billion, one hundred eighty-eight million, five hundred fifty-eight thousand, four hundred four".