289543420 has 24 divisors (see below), whose sum is σ = 611778384. Its totient is φ = 115105536.

The previous prime is 289543417. The next prime is 289543421. The reversal of 289543420 is 24345982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 289543420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289543421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41149 + ... + 47668.

It is an arithmetic number, because the mean of its divisors is an integer number (25490766).

Almost surely, 2^289543420 is an apocalyptic number.

289543420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289543420 is an abundant number, since it is smaller than the sum of its proper divisors (322234964).

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

289543420 is a wasteful number, since it uses less digits than its factorization.

289543420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88989 (or 88987 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 289543420 is about 17015.9754348671. The cubic root of 289543420 is about 661.5630386163.

The spelling of 289543420 in words is "two hundred eighty-nine million, five hundred forty-three thousand, four hundred twenty".