289238856 has 32 divisors (see below), whose sum is σ = 723945600. Its totient is φ = 96299840.

The previous prime is 289238849. The next prime is 289238891. The reversal of 289238856 is 658832982.

It is a junction number, because it is equal to n+sod(n) for n = 289238799 and 289238808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15250 + ... + 28478.

It is an arithmetic number, because the mean of its divisors is an integer number (22623300).

Almost surely, 2^289238856 is an apocalyptic number.

It is an amenable number.

289238856 is an abundant number, since it is smaller than the sum of its proper divisors (434706744).

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

289238856 is a wasteful number, since it uses less digits than its factorization.

289238856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14149 (or 14145 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 289238856 is about 17007.0237255082. The cubic root of 289238856 is about 661.3309963045.

The spelling of 289238856 in words is "two hundred eighty-nine million, two hundred thirty-eight thousand, eight hundred fifty-six".