289978140686 has 16 divisors (see below), whose sum is σ = 471796206000. Its totient is φ = 132873213888.

The previous prime is 289978140677. The next prime is 289978140689. The reversal of 289978140686 is 686041879982.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289978140689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40115111 + ... + 40122338.

It is an arithmetic number, because the mean of its divisors is an integer number (29487262875).

Almost surely, 2^289978140686 is an apocalyptic number.

289978140686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

289978140686 is a deficient number, since it is larger than the sum of its proper divisors (181818065314).

289978140686 is a wasteful number, since it uses less digits than its factorization.

289978140686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80237603.

The product of its (nonzero) digits is 83607552, while the sum is 68.

The spelling of 289978140686 in words is "two hundred eighty-nine billion, nine hundred seventy-eight million, one hundred forty thousand, six hundred eighty-six".