3986661888 has 280 divisors, whose sum is σ = 13041973296. Its totient is φ = 1206835200.

The previous prime is 3986661863. The next prime is 3986661949. The reversal of 3986661888 is 8881666893.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4105243 + ... + 4106213.

Almost surely, 2^3986661888 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 3986661888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6520986648).

3986661888 is an abundant number, since it is smaller than the sum of its proper divisors (9055311408).

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

3986661888 is an frugal number, since it uses more digits than its factorization.

3986661888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 987 counting only the distinct ones).

The product of its digits is 23887872, while the sum is 63.

The square root of 3986661888 is about 63140.0181184643. The cubic root of 3986661888 is about 1585.6346760826.

The spelling of 3986661888 in words is "three billion, nine hundred eighty-six million, six hundred sixty-one thousand, eight hundred eighty-eight".