289001000 has 32 divisors (see below), whose sum is σ = 676264680. Its totient is φ = 115600000.

The previous prime is 289000993. The next prime is 289001021. The reversal of 289001000 is 100982.

It can be written as a sum of positive squares in 4 ways, for example, as 87871876 + 201129124 = 9374^2 + 14182^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143501 + ... + 145500.

Almost surely, 2^289001000 is an apocalyptic number.

289001000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289001000 is an abundant number, since it is smaller than the sum of its proper divisors (387263680).

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

289001000 is a wasteful number, since it uses less digits than its factorization.

289001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289022 (or 289008 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 289001000 is about 17000.0294117393. The cubic root of 289001000 is about 661.1496644157.

Adding to 289001000 its reverse (100982), we get a palindrome (289101982).

The spelling of 289001000 in words is "two hundred eighty-nine million, one thousand".