3865898880 has 512 divisors, whose sum is σ = 14593996800. Its totient is φ = 965099520.

The previous prime is 3865898879. The next prime is 3865898941. The reversal of 3865898880 is 888985683.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28218172 + ... + 28218308.

It is an arithmetic number, because the mean of its divisors is an integer number (28503900).

Almost surely, 2^3865898880 is an apocalyptic number.

3865898880 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 3865898880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7296998400).

3865898880 is an abundant number, since it is smaller than the sum of its proper divisors (10728097920).

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

3865898880 is a wasteful number, since it uses less digits than its factorization.

3865898880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The square root of 3865898880 is about 62176.3530612724. The cubic root of 3865898880 is about 1569.4596812717.

The spelling of 3865898880 in words is "three billion, eight hundred sixty-five million, eight hundred ninety-eight thousand, eight hundred eighty".