289428868 has 12 divisors (see below), whose sum is σ = 506852892. Its totient is φ = 144613760.

The previous prime is 289428833. The next prime is 289428877. The reversal of 289428868 is 868824982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 235376964 + 54051904 = 15342^2 + 7352^2 .

It is a super-2 number, since 2×289428868² = 167538139263522848, 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, 18505 + ... + 30352.

It is an arithmetic number, because the mean of its divisors is an integer number (42237741).

Almost surely, 2^289428868 is an apocalyptic number.

It is an amenable number.

289428868 is a deficient number, since it is larger than the sum of its proper divisors (217424024).

289428868 is a wasteful number, since it uses less digits than its factorization.

289428868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50342 (or 50340 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 55.

The square root of 289428868 is about 17012.6090885555. The cubic root of 289428868 is about 661.4757824280.

The spelling of 289428868 in words is "two hundred eighty-nine million, four hundred twenty-eight thousand, eight hundred sixty-eight".