27931986670 has 16 divisors (see below), whose sum is σ = 57460087008. Its totient is φ = 9576681120.

The previous prime is 27931986617. The next prime is 27931986671. The reversal of 27931986670 is 7668913972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27931986671) 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, 199514121 + ... + 199514260.

It is an arithmetic number, because the mean of its divisors is an integer number (3591255438).

Almost surely, 2^27931986670 is an apocalyptic number.

27931986670 is an abundant number, since it is smaller than the sum of its proper divisors (29528100338).

27931986670 is a wasteful number, since it uses less digits than its factorization.

27931986670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399028395.

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 27931986670 in words is "twenty-seven billion, nine hundred thirty-one million, nine hundred eighty-six thousand, six hundred seventy".