8189819442 has 40 divisors (see below), whose sum is σ = 20972873856. Its totient is φ = 2339948088.

The previous prime is 8189819389. The next prime is 8189819459. The reversal of 8189819442 is 2449189818.

It is a happy number.

8189819442 is a `hidden beast` number, since 8 + 189 + 8 + 19 + 442 = 666.

It is a super-2 number, since 2×8189819442² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3609898 + ... + 3612165.

Almost surely, 2^8189819442 is an apocalyptic number.

8189819442 is an abundant number, since it is smaller than the sum of its proper divisors (12783054414).

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

8189819442 is a wasteful number, since it uses less digits than its factorization.

8189819442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7222084 (or 7222075 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 8189819442 is about 90497.6211952557. The cubic root of 8189819442 is about 2015.6948012691.

The spelling of 8189819442 in words is "eight billion, one hundred eighty-nine million, eight hundred nineteen thousand, four hundred forty-two".