289144978 has 8 divisors (see below), whose sum is σ = 433888560. Its totient is φ = 144515460.

The previous prime is 289144963. The next prime is 289145011. The reversal of 289144978 is 879441982.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 21868 + ... + 32503.

It is an arithmetic number, because the mean of its divisors is an integer number (54236070).

Almost surely, 2^289144978 is an apocalyptic number.

289144978 is a deficient number, since it is larger than the sum of its proper divisors (144743582).

289144978 is a wasteful number, since it uses less digits than its factorization.

289144978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57032.

The product of its digits is 1161216, while the sum is 52.

The square root of 289144978 is about 17004.2635241871. The cubic root of 289144978 is about 661.2594393565.

The spelling of 289144978 in words is "two hundred eighty-nine million, one hundred forty-four thousand, nine hundred seventy-eight".