289442690 has 8 divisors (see below), whose sum is σ = 520996860. Its totient is φ = 115777072.

The previous prime is 289442683. The next prime is 289442693. The reversal of 289442690 is 96244982.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 287946961 + 1495729 = 16969^2 + 1223^2 .

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

It is a super-2 number, since 2×289442690² = 167554141588872200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289442693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14472125 + ... + 14472144.

Almost surely, 2^289442690 is an apocalyptic number.

289442690 is a deficient number, since it is larger than the sum of its proper divisors (231554170).

289442690 is a wasteful number, since it uses less digits than its factorization.

289442690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28944276.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 289442690 is about 17013.0153118135. The cubic root of 289442690 is about 661.4863120996.

The spelling of 289442690 in words is "two hundred eighty-nine million, four hundred forty-two thousand, six hundred ninety".