289678928 has 80 divisors (see below), whose sum is σ = 730238976. Its totient is φ = 107944320.

The previous prime is 289678913. The next prime is 289678931. The reversal of 289678928 is 829876982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23225 + ... + 33447.

Almost surely, 2^289678928 is an apocalyptic number.

289678928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 289678928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365119488).

289678928 is an abundant number, since it is smaller than the sum of its proper divisors (440560048).

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

289678928 is a wasteful number, since it uses less digits than its factorization.

289678928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10272 (or 10266 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 59.

The square root of 289678928 is about 17019.9567567018. The cubic root of 289678928 is about 661.6662276334. Note that the first 3 decimals are identical.

The spelling of 289678928 in words is "two hundred eighty-nine million, six hundred seventy-eight thousand, nine hundred twenty-eight".