289131439866 has 32 divisors (see below), whose sum is σ = 583866124800. Its totient is φ = 95447752704.

The previous prime is 289131439813. The next prime is 289131439867. The reversal of 289131439866 is 668934131982.

It is not an unprimeable number, because it can be changed into a prime (289131439867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301591 + ... + 818058.

It is an arithmetic number, because the mean of its divisors is an integer number (18245816400).

Almost surely, 2^289131439866 is an apocalyptic number.

289131439866 is an abundant number, since it is smaller than the sum of its proper divisors (294734684934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289131439866 is a wasteful number, since it uses less digits than its factorization.

289131439866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120070.

The product of its digits is 13436928, while the sum is 60.

The spelling of 289131439866 in words is "two hundred eighty-nine billion, one hundred thirty-one million, four hundred thirty-nine thousand, eight hundred sixty-six".