3871549780 has 72 divisors (see below), whose sum is σ = 9480240000. Its totient is φ = 1324217664.

The previous prime is 3871549771. The next prime is 3871549783. The reversal of 3871549780 is 879451783.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871549783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 425721 + ... + 434719.

It is an arithmetic number, because the mean of its divisors is an integer number (131670000).

Almost surely, 2^3871549780 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 3871549780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4740120000).

3871549780 is an abundant number, since it is smaller than the sum of its proper divisors (5608690220).

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

3871549780 is a wasteful number, since it uses less digits than its factorization.

3871549780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9461 (or 9452 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 3871549780 is about 62221.7789845324. The cubic root of 3871549780 is about 1570.2240176914.

The spelling of 3871549780 in words is "three billion, eight hundred seventy-one million, five hundred forty-nine thousand, seven hundred eighty".