289431745 has 8 divisors (see below), whose sum is σ = 359294760. Its totient is φ = 223560960.

The previous prime is 289431743. The next prime is 289431767. The reversal of 289431745 is 547134982.

It can be written as a sum of positive squares in 4 ways, for example, as 7225344 + 282206401 = 2688^2 + 16799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289431745 - 2¹ = 289431743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289431743) 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, 997896 + ... + 998185.

It is an arithmetic number, because the mean of its divisors is an integer number (44911845).

Almost surely, 2^289431745 is an apocalyptic number.

It is an amenable number.

289431745 is a deficient number, since it is larger than the sum of its proper divisors (69863015).

289431745 is a wasteful number, since it uses less digits than its factorization.

289431745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996115.

The product of its digits is 241920, while the sum is 43.

The square root of 289431745 is about 17012.6936432771. The cubic root of 289431745 is about 661.4779741692.

The spelling of 289431745 in words is "two hundred eighty-nine million, four hundred thirty-one thousand, seven hundred forty-five".