289662381 has 24 divisors (see below), whose sum is σ = 431084160. Its totient is φ = 187288416.

The previous prime is 289662341. The next prime is 289662383. The reversal of 289662381 is 183266982.

It is not a de Polignac number, because 289662381 - 2²² = 285468077 is a prime.

It is a super-2 number, since 2×289662381² = 167808589933178322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289662383) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118336 + ... + 120758.

It is an arithmetic number, because the mean of its divisors is an integer number (17961840).

Almost surely, 2^289662381 is an apocalyptic number.

It is an amenable number.

289662381 is a deficient number, since it is larger than the sum of its proper divisors (141421779).

289662381 is a wasteful number, since it uses less digits than its factorization.

289662381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2822 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 289662381 is about 17019.4706439419. The cubic root of 289662381 is about 661.6536288576.

The spelling of 289662381 in words is "two hundred eighty-nine million, six hundred sixty-two thousand, three hundred eighty-one".