194239109988 has 576 divisors, whose sum is σ = 664492308480. Its totient is φ = 46320076800.

The previous prime is 194239109963. The next prime is 194239109989. The reversal of 194239109988 is 889901932491.

194239109988 is a `hidden beast` number, since 19 + 423 + 9 + 109 + 98 + 8 = 666.

It is a super-2 number, since 2×194239109988² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (194239109989) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 632700531 + ... + 632700837.

It is an arithmetic number, because the mean of its divisors is an integer number (1153632480).

Almost surely, 2^194239109988 is an apocalyptic number.

194239109988 is a gapful number since it is divisible by the number (18) 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 194239109988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332246154240).

194239109988 is an abundant number, since it is smaller than the sum of its proper divisors (470253198492).

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

194239109988 is a wasteful number, since it uses less digits than its factorization.

194239109988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 63.

The spelling of 194239109988 in words is "one hundred ninety-four billion, two hundred thirty-nine million, one hundred nine thousand, nine hundred eighty-eight".