190389445992 has 192 divisors, whose sum is σ = 568033689600. Its totient is φ = 57346652160.

The previous prime is 190389445991. The next prime is 190389446029. The reversal of 190389445992 is 299544983091.

190389445992 is a `hidden beast` number, since 1 + 9 + 0 + 3 + 8 + 94 + 459 + 92 = 666.

It is a super-2 number, since 2×190389445992² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (190389445991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4799134 + ... + 4838642.

It is an arithmetic number, because the mean of its divisors is an integer number (2958508800).

Almost surely, 2^190389445992 is an apocalyptic number.

190389445992 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 190389445992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284016844800).

190389445992 is an abundant number, since it is smaller than the sum of its proper divisors (377644243608).

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

190389445992 is a wasteful number, since it uses less digits than its factorization.

190389445992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39696 (or 39689 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 190389445992 in words is "one hundred ninety billion, three hundred eighty-nine million, four hundred forty-five thousand, nine hundred ninety-two".