3986841840 has 40 divisors (see below), whose sum is σ = 12359210448. Its totient is φ = 1063157760.

The previous prime is 3986841811. The next prime is 3986841841. The reversal of 3986841840 is 481486893.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986841841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8305681 + ... + 8306160.

Almost surely, 2^3986841840 is an apocalyptic number.

3986841840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3986841840 is an abundant number, since it is smaller than the sum of its proper divisors (8372368608).

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

3986841840 is a wasteful number, since it uses less digits than its factorization.

3986841840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16611857 (or 16611851 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 51.

The square root of 3986841840 is about 63141.4431257316. The cubic root of 3986841840 is about 1585.6585334555.

The spelling of 3986841840 in words is "three billion, nine hundred eighty-six million, eight hundred forty-one thousand, eight hundred forty".