3989317920 has 384 divisors, whose sum is σ = 15324567552. Its totient is φ = 851558400.

The previous prime is 3989317901. The next prime is 3989317939. The reversal of 3989317920 is 297139893.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3989317901) and next prime (3989317939).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12052155 + ... + 12052485.

It is an arithmetic number, because the mean of its divisors is an integer number (39907728).

Almost surely, 2^3989317920 is an apocalyptic number.

3989317920 is a gapful number since it is divisible by the number (30) 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 3989317920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7662283776).

3989317920 is an abundant number, since it is smaller than the sum of its proper divisors (11335249632).

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

3989317920 is a wasteful number, since it uses less digits than its factorization.

3989317920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 3989317920 is about 63161.0474897306. The cubic root of 3989317920 is about 1585.9867301427.

The spelling of 3989317920 in words is "three billion, nine hundred eighty-nine million, three hundred seventeen thousand, nine hundred twenty".