289129856 has 16 divisors (see below), whose sum is σ = 576001140. Its totient is φ = 144564864.

The previous prime is 289129811. The next prime is 289129861. The reversal of 289129856 is 658921982.

289129856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1129286 + ... + 1129541.

Almost surely, 2^289129856 is an apocalyptic number.

It is an amenable number.

289129856 is a deficient number, since it is larger than the sum of its proper divisors (286871284).

289129856 is an equidigital number, since it uses as much as digits as its factorization.

289129856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258841 (or 2258829 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 289129856 is about 17003.8188651844. The cubic root of 289129856 is about 661.2479114145.

The spelling of 289129856 in words is "two hundred eighty-nine million, one hundred twenty-nine thousand, eight hundred fifty-six".