289404885 has 64 divisors (see below), whose sum is σ = 579815424. Its totient is φ = 119750400.

The previous prime is 289404881. The next prime is 289404893. The reversal of 289404885 is 588404982.

It is not a de Polignac number, because 289404885 - 2² = 289404881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289404881) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381927 + ... + 382683.

It is an arithmetic number, because the mean of its divisors is an integer number (9059616).

Almost surely, 2^289404885 is an apocalyptic number.

It is an amenable number.

289404885 is an abundant number, since it is smaller than the sum of its proper divisors (290410539).

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

289404885 is a wasteful number, since it uses less digits than its factorization.

289404885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 289404885 is about 17011.9042144023. The cubic root of 289404885 is about 661.4575112583.

The spelling of 289404885 in words is "two hundred eighty-nine million, four hundred four thousand, eight hundred eighty-five".