289390145986 has 16 divisors (see below), whose sum is σ = 439693130520. Its totient is φ = 142831180800.

The previous prime is 289390145939. The next prime is 289390146007. The reversal of 289390145986 is 689541093982.

It can be written as a sum of positive squares in 4 ways, for example, as 289369760761 + 20385225 = 537931^2 + 4515^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245591 + ... + 1459546.

Almost surely, 2^289390145986 is an apocalyptic number.

289390145986 is a deficient number, since it is larger than the sum of its proper divisors (150302984534).

289390145986 is a wasteful number, since it uses less digits than its factorization.

289390145986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705829.

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 289390145986 in words is "two hundred eighty-nine billion, three hundred ninety million, one hundred forty-five thousand, nine hundred eighty-six".