289446980 has 12 divisors (see below), whose sum is σ = 607838700. Its totient is φ = 115778784.

The previous prime is 289446961. The next prime is 289446991. The reversal of 289446980 is 89644982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73239364 + 216207616 = 8558^2 + 14704^2 .

It is a super-2 number, since 2×289446980² = 167559108462240800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7236155 + ... + 7236194.

It is an arithmetic number, because the mean of its divisors is an integer number (50653225).

Almost surely, 2^289446980 is an apocalyptic number.

289446980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289446980 is an abundant number, since it is smaller than the sum of its proper divisors (318391720).

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

289446980 is a wasteful number, since it uses less digits than its factorization.

289446980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14472358 (or 14472356 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 289446980 is about 17013.1413912893. The cubic root of 289446980 is about 661.4895801757.

The spelling of 289446980 in words is "two hundred eighty-nine million, four hundred forty-six thousand, nine hundred eighty".