3955645880 has 64 divisors (see below), whose sum is σ = 9218119680. Its totient is φ = 1526083200.

The previous prime is 3955645877. The next prime is 3955645949. The reversal of 3955645880 is 885465593.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375485 + ... + 385875.

It is an arithmetic number, because the mean of its divisors is an integer number (144033120).

Almost surely, 2^3955645880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3955645880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4609059840).

3955645880 is an abundant number, since it is smaller than the sum of its proper divisors (5262473800).

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

3955645880 is a wasteful number, since it uses less digits than its factorization.

3955645880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740 (or 10736 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 53.

The square root of 3955645880 is about 62893.9256208420. The cubic root of 3955645880 is about 1581.5119160157.

The spelling of 3955645880 in words is "three billion, nine hundred fifty-five million, six hundred forty-five thousand, eight hundred eighty".