289739968 has 56 divisors (see below), whose sum is σ = 691692800. Its totient is φ = 117635328.

The previous prime is 289739963. The next prime is 289739971. The reversal of 289739968 is 869937982.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (289739963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8508 + ... + 25531.

Almost surely, 2^289739968 is an apocalyptic number.

289739968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

289739968 is an abundant number, since it is smaller than the sum of its proper divisors (401952832).

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

289739968 is a wasteful number, since it uses less digits than its factorization.

289739968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34077 (or 34067 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The square root of 289739968 is about 17021.7498512932. The cubic root of 289739968 is about 661.7126989345.

The spelling of 289739968 in words is "two hundred eighty-nine million, seven hundred thirty-nine thousand, nine hundred sixty-eight".