3866849280 has 728 divisors, whose sum is σ = 16329839712. Its totient is φ = 859963392.

The previous prime is 3866849269. The next prime is 3866849281. The reversal of 3866849280 is 829486683.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3866849281) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 104509422 + ... + 104509458.

Almost surely, 2^3866849280 is an apocalyptic number.

3866849280 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 3866849280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8164919856).

3866849280 is an abundant number, since it is smaller than the sum of its proper divisors (12462990432).

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

3866849280 is an frugal number, since it uses more digits than its factorization.

3866849280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The square root of 3866849280 is about 62183.9953685834. The cubic root of 3866849280 is about 1569.5882837270.

The spelling of 3866849280 in words is "three billion, eight hundred sixty-six million, eight hundred forty-nine thousand, two hundred eighty".