289020730 has 16 divisors (see below), whose sum is σ = 520579080. Its totient is φ = 115532352.

The previous prime is 289020707. The next prime is 289020733. The reversal of 289020730 is 37020982.

It can be written as a sum of positive squares in 4 ways, for example, as 270898681 + 18122049 = 16459^2 + 4257^2 .

It is a junction number, because it is equal to n+sod(n) for n = 289020692 and 289020701.

It is not an unprimeable number, because it can be changed into a prime (289020733) 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, 8032 + ... + 25348.

Almost surely, 2^289020730 is an apocalyptic number.

289020730 is a deficient number, since it is larger than the sum of its proper divisors (231558350).

289020730 is a wasteful number, since it uses less digits than its factorization.

289020730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18993.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 289020730 is about 17000.6096949492. The cubic root of 289020730 is about 661.1647095610.

The spelling of 289020730 in words is "two hundred eighty-nine million, twenty thousand, seven hundred thirty".