188105412 has 48 divisors (see below), whose sum is σ = 485581824. Its totient is φ = 56196000.

The previous prime is 188105387. The next prime is 188105413. The reversal of 188105412 is 214501881.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 188105412.

It is not an unprimeable number, because it can be changed into a prime (188105413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 664 + ... + 19407.

It is an arithmetic number, because the mean of its divisors is an integer number (10116288).

Almost surely, 2^188105412 is an apocalyptic number.

188105412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188105412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242790912).

188105412 is an abundant number, since it is smaller than the sum of its proper divisors (297476412).

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

188105412 is a wasteful number, since it uses less digits than its factorization.

188105412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20160 (or 20158 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 188105412 is about 13715.1526422421. The cubic root of 188105412 is about 572.9724805487.

The spelling of 188105412 in words is "one hundred eighty-eight million, one hundred five thousand, four hundred twelve".