3989541952890 has 256 divisors, whose sum is σ = 11768212431360. Its totient is φ = 955507415040.

The previous prime is 3989541952873. The next prime is 3989541952897. The reversal of 3989541952890 is 982591459893.

3989541952890 is a `hidden beast` number, since 3 + 9 + 8 + 9 + 5 + 4 + 1 + 9 + 528 + 90 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3989541952897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 53641269 + ... + 53715591.

It is an arithmetic number, because the mean of its divisors is an integer number (45969579810).

Almost surely, 2^{3989541952890} is an apocalyptic number.

3989541952890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989541952890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5884106215680).

3989541952890 is an abundant number, since it is smaller than the sum of its proper divisors (7778670478470).

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

3989541952890 is a wasteful number, since it uses less digits than its factorization.

3989541952890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74766 (or 74760 counting only the distinct ones).

The product of its (nonzero) digits is 251942400, while the sum is 72.

The spelling of 3989541952890 in words is "three trillion, nine hundred eighty-nine billion, five hundred forty-one million, nine hundred fifty-two thousand, eight hundred ninety".