289430487 has 6 divisors (see below), whose sum is σ = 418066272. Its totient is φ = 192953652.

The previous prime is 289430429. The next prime is 289430489. The reversal of 289430487 is 784034982.

It is not a de Polignac number, because 289430487 - 2⁸ = 289430231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289430489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16079463 + ... + 16079480.

It is an arithmetic number, because the mean of its divisors is an integer number (69677712).

Almost surely, 2^289430487 is an apocalyptic number.

289430487 is a deficient number, since it is larger than the sum of its proper divisors (128635785).

289430487 is a wasteful number, since it uses less digits than its factorization.

289430487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32158949 (or 32158946 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 289430487 is about 17012.6566708436. The cubic root of 289430487 is about 661.4770158080.

The spelling of 289430487 in words is "two hundred eighty-nine million, four hundred thirty thousand, four hundred eighty-seven".