189239595940 has 12 divisors (see below), whose sum is σ = 397403151516. Its totient is φ = 75695838368.

The previous prime is 189239595871. The next prime is 189239595943. The reversal of 189239595940 is 49595932981.

It can be written as a sum of positive squares in 2 ways, for example, as 67783163904 + 121456432036 = 260352^2 + 348506^2 .

It is not an unprimeable number, because it can be changed into a prime (189239595943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4730989879 + ... + 4730989918.

It is an arithmetic number, because the mean of its divisors is an integer number (33116929293).

Almost surely, 2^189239595940 is an apocalyptic number.

189239595940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189239595940 is an abundant number, since it is smaller than the sum of its proper divisors (208163555576).

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

189239595940 is a wasteful number, since it uses less digits than its factorization.

189239595940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461979806 (or 9461979804 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 64.

The spelling of 189239595940 in words is "one hundred eighty-nine billion, two hundred thirty-nine million, five hundred ninety-five thousand, nine hundred forty".