3849985280 has 72 divisors (see below), whose sum is σ = 9446971464. Its totient is φ = 1502412800.

The previous prime is 3849985267. The next prime is 3849985313. The reversal of 3849985280 is 825899483.

It can be written as a sum of positive squares in 4 ways, for example, as 190219264 + 3659766016 = 13792^2 + 60496^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15800 + ... + 89160.

It is an arithmetic number, because the mean of its divisors is an integer number (131207937).

Almost surely, 2^3849985280 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 3849985280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4723485732).

3849985280 is an abundant number, since it is smaller than the sum of its proper divisors (5596986184).

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

3849985280 is an equidigital number, since it uses as much as digits as its factorization.

3849985280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73423 (or 73409 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The square root of 3849985280 is about 62048.2496127006. The cubic root of 3849985280 is about 1567.3032097721.

The spelling of 3849985280 in words is "three billion, eight hundred forty-nine million, nine hundred eighty-five thousand, two hundred eighty".