3986389281 has 8 divisors (see below), whose sum is σ = 6074497984. Its totient is φ = 2277936720.

The previous prime is 3986389273. The next prime is 3986389307. The reversal of 3986389281 is 1829836893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3986389281 - 2³ = 3986389273 is a prime.

It is a super-2 number, since 2×3986389281² = 31782598999343393922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3981389281) 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, 94914010 + ... + 94914051.

It is an arithmetic number, because the mean of its divisors is an integer number (759312248).

Almost surely, 2^3986389281 is an apocalyptic number.

It is an amenable number.

3986389281 is a deficient number, since it is larger than the sum of its proper divisors (2088108703).

3986389281 is a wasteful number, since it uses less digits than its factorization.

3986389281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189828071.

The product of its digits is 4478976, while the sum is 57.

The square root of 3986389281 is about 63137.8593317829. The cubic root of 3986389281 is about 1585.5985334837.

The spelling of 3986389281 in words is "three billion, nine hundred eighty-six million, three hundred eighty-nine thousand, two hundred eighty-one".