289980885 has 16 divisors (see below), whose sum is σ = 471576960. Its totient is φ = 152120640.

The previous prime is 289980881. The next prime is 289980919. The reversal of 289980885 is 588089982.

It is not a de Polignac number, because 289980885 - 2² = 289980881 is a prime.

It is a super-4 number, since 4×289980885⁴ (a number of 35 digits) contains 4444 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289980881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157545 + ... + 159374.

It is an arithmetic number, because the mean of its divisors is an integer number (29473560).

Almost surely, 2^289980885 is an apocalyptic number.

It is an amenable number.

289980885 is a deficient number, since it is larger than the sum of its proper divisors (181596075).

289980885 is a wasteful number, since it uses less digits than its factorization.

289980885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316988.

The product of its (nonzero) digits is 3317760, while the sum is 57.

The square root of 289980885 is about 17028.8251209530. The cubic root of 289980885 is about 661.8960514704.

The spelling of 289980885 in words is "two hundred eighty-nine million, nine hundred eighty thousand, eight hundred eighty-five".