188212281240 has 128 divisors (see below), whose sum is σ = 567131685120. Its totient is φ = 49968576000.

The previous prime is 188212281221. The next prime is 188212281247. The reversal of 188212281240 is 42182212881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188212281247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38716410 + ... + 38721270.

It is an arithmetic number, because the mean of its divisors is an integer number (4430716290).

Almost surely, 2^188212281240 is an apocalyptic number.

188212281240 is a gapful number since it is divisible by the number (10) 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 188212281240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283565842560).

188212281240 is an abundant number, since it is smaller than the sum of its proper divisors (378919403880).

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

188212281240 is a wasteful number, since it uses less digits than its factorization.

188212281240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6233 (or 6229 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The spelling of 188212281240 in words is "one hundred eighty-eight billion, two hundred twelve million, two hundred eighty-one thousand, two hundred forty".