3944836140 has 192 divisors, whose sum is σ = 13013145600. Its totient is φ = 892442880.

The previous prime is 3944836139. The next prime is 3944836177. The reversal of 3944836140 is 416384493.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 3944836092 and 3944836101.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2118810 + ... + 2120670.

It is an arithmetic number, because the mean of its divisors is an integer number (67776800).

Almost surely, 2^3944836140 is an apocalyptic number.

3944836140 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 3944836140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6506572800).

3944836140 is an abundant number, since it is smaller than the sum of its proper divisors (9068309460).

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

3944836140 is a wasteful number, since it uses less digits than its factorization.

3944836140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997 (or 1981 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 3944836140 is about 62807.9305502100. The cubic root of 3944836140 is about 1580.0699830135.

The spelling of 3944836140 in words is "three billion, nine hundred forty-four million, eight hundred thirty-six thousand, one hundred forty".