3986257990 has 32 divisors (see below), whose sum is σ = 8429684256. Its totient is φ = 1338044160.

The previous prime is 3986257981. The next prime is 3986257991. The reversal of 3986257990 is 997526893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3986257991) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1392367 + ... + 1395226.

It is an arithmetic number, because the mean of its divisors is an integer number (263427633).

Almost surely, 2^3986257990 is an apocalyptic number.

3986257990 is an abundant number, since it is smaller than the sum of its proper divisors (4443426266).

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

3986257990 is a wasteful number, since it uses less digits than its factorization.

3986257990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2787624.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The square root of 3986257990 is about 63136.8196063121. The cubic root of 3986257990 is about 1585.5811261603.

The spelling of 3986257990 in words is "three billion, nine hundred eighty-six million, two hundred fifty-seven thousand, nine hundred ninety".