3939840000 has 650 divisors, whose sum is σ = 15481153820. Its totient is φ = 995328000.

The previous prime is 3939839977. The next prime is 3939840007. The reversal of 3939840000 is 489393.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3939840007) by changing a digit.

It is a polite number, since it can be written in 49 ways as a sum of consecutive naturals, for example, 207359991 + ... + 207360009.

Almost surely, 2^3939840000 is an apocalyptic number.

3939840000 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 3939840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7740576910).

3939840000 is an abundant number, since it is smaller than the sum of its proper divisors (11541313820).

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

3939840000 is an frugal number, since it uses more digits than its factorization.

3939840000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 3939840000 is about 62768.1447869857. The cubic root of 3939840000 is about 1579.4026476579.

The spelling of 3939840000 in words is "three billion, nine hundred thirty-nine million, eight hundred forty thousand".