2188631408 has 40 divisors (see below), whose sum is σ = 4500524448. Its totient is φ = 1027510272.

The previous prime is 2188631381. The next prime is 2188631411. The reversal of 2188631408 is 8041368812.

2188631408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108485 + ... + 127067.

Almost surely, 2^2188631408 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 2188631408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2250262224).

2188631408 is an abundant number, since it is smaller than the sum of its proper divisors (2311893040).

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

2188631408 is a wasteful number, since it uses less digits than its factorization.

2188631408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19041 (or 19035 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 2188631408 is about 46782.8110314034. The cubic root of 2188631408 is about 1298.3472899126.

The spelling of 2188631408 in words is "two billion, one hundred eighty-eight million, six hundred thirty-one thousand, four hundred eight".