3899956860 has 144 divisors (see below), whose sum is σ = 12350257920. Its totient is φ = 995005440.

The previous prime is 3899956813. The next prime is 3899956861. The reversal of 3899956860 is 686599983.

3899956860 is a `hidden beast` number, since 3 + 8 + 9 + 9 + 9 + 568 + 60 = 666.

It is a super-2 number, since 2×3899956860² = 30419327019722119200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899956861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 492694 + ... + 500546.

It is an arithmetic number, because the mean of its divisors is an integer number (85765680).

Almost surely, 2^3899956860 is an apocalyptic number.

3899956860 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 3899956860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6175128960).

3899956860 is an abundant number, since it is smaller than the sum of its proper divisors (8450301060).

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

3899956860 is a wasteful number, since it uses less digits than its factorization.

3899956860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7988 (or 7983 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The square root of 3899956860 is about 62449.6345866011. The cubic root of 3899956860 is about 1574.0551127649.

It can be divided in two parts, 38999 and 56860, that added together give a palindrome (95859).

The spelling of 3899956860 in words is "three billion, eight hundred ninety-nine million, nine hundred fifty-six thousand, eight hundred sixty".