289749385 has 8 divisors (see below), whose sum is σ = 347942016. Its totient is φ = 231637680.

The previous prime is 289749371. The next prime is 289749389. The reversal of 289749385 is 583947982.

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

It is not a de Polignac number, because 289749385 - 2⁹ = 289748873 is a prime.

It is a super-2 number, since 2×289749385² = 167909412215756450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289749389) 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, 12051 + ... + 26920.

It is an arithmetic number, because the mean of its divisors is an integer number (43492752).

Almost surely, 2^289749385 is an apocalyptic number.

It is an amenable number.

289749385 is a deficient number, since it is larger than the sum of its proper divisors (58192631).

289749385 is a wasteful number, since it uses less digits than its factorization.

289749385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40463.

The product of its digits is 4354560, while the sum is 55.

The square root of 289749385 is about 17022.0264657296. The cubic root of 289749385 is about 661.7198677544.

The spelling of 289749385 in words is "two hundred eighty-nine million, seven hundred forty-nine thousand, three hundred eighty-five".