3939944880 has 160 divisors (see below), whose sum is σ = 13020595200. Its totient is φ = 982665216.

The previous prime is 3939944797. The next prime is 3939944881. The reversal of 3939944880 is 884499393.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 3939944880.

It is not an unprimeable number, because it can be changed into a prime (3939944881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354772 + ... + 365708.

It is an arithmetic number, because the mean of its divisors is an integer number (81378720).

Almost surely, 2^3939944880 is an apocalyptic number.

3939944880 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 3939944880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6510297600).

3939944880 is an abundant number, since it is smaller than the sum of its proper divisors (9080650320).

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

3939944880 is a wasteful number, since it uses less digits than its factorization.

3939944880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051 (or 11045 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The square root of 3939944880 is about 62768.9802370566. The cubic root of 3939944880 is about 1579.4166622947.

The spelling of 3939944880 in words is "three billion, nine hundred thirty-nine million, nine hundred forty-four thousand, eight hundred eighty".