289409649 has 16 divisors (see below), whose sum is σ = 414681408. Its totient is φ = 178877952.

The previous prime is 289409599. The next prime is 289409663. The reversal of 289409649 is 946904982.

It is a happy number.

It is not a de Polignac number, because 289409649 - 2¹⁹ = 288885361 is a prime.

It is a super-3 number, since 3×289409649³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (289409689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38932 + ... + 45765.

It is an arithmetic number, because the mean of its divisors is an integer number (25917588).

Almost surely, 2^289409649 is an apocalyptic number.

It is an amenable number.

289409649 is a deficient number, since it is larger than the sum of its proper divisors (125271759).

289409649 is a wasteful number, since it uses less digits than its factorization.

289409649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84784.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 289409649 is about 17012.0442334247. The cubic root of 289409649 is about 661.4611407367.

The spelling of 289409649 in words is "two hundred eighty-nine million, four hundred nine thousand, six hundred forty-nine".