3989653695890 has 8 divisors (see below), whose sum is σ = 7181376652620. Its totient is φ = 1595861478352.

The previous prime is 3989653695851. The next prime is 3989653695919. The reversal of 3989653695890 is 985963569893.

It can be written as a sum of positive squares in 2 ways, for example, as 3753468387769 + 236185308121 = 1937387^2 + 485989^2 .

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

It is a super-2 number, since 2×3989653695890² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199482684785 + ... + 199482684804.

Almost surely, 2^{3989653695890} is an apocalyptic number.

3989653695890 is a deficient number, since it is larger than the sum of its proper divisors (3191722956730).

3989653695890 is a wasteful number, since it uses less digits than its factorization.

3989653695890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398965369596.

The product of its (nonzero) digits is 3401222400, while the sum is 80.

The spelling of 3989653695890 in words is "three trillion, nine hundred eighty-nine billion, six hundred fifty-three million, six hundred ninety-five thousand, eight hundred ninety".