289638869928 has 32 divisors (see below), whose sum is σ = 766691127360. Its totient is φ = 90867096320.

The previous prime is 289638869867. The next prime is 289638869941. The reversal of 289638869928 is 829968836982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354949188 + ... + 354950003.

It is an arithmetic number, because the mean of its divisors is an integer number (23959097730).

Almost surely, 2^289638869928 is an apocalyptic number.

It is an amenable number.

289638869928 is an abundant number, since it is smaller than the sum of its proper divisors (477052257432).

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

289638869928 is a wasteful number, since it uses less digits than its factorization.

289638869928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709899217 (or 709899213 counting only the distinct ones).

The product of its digits is 1289945088, while the sum is 78.

The spelling of 289638869928 in words is "two hundred eighty-nine billion, six hundred thirty-eight million, eight hundred sixty-nine thousand, nine hundred twenty-eight".