242978289 has 8 divisors (see below), whose sum is σ = 341022240. Its totient is φ = 153459936.

The previous prime is 242978287. The next prime is 242978293. The reversal of 242978289 is 982879242.

It is a happy number.

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

It is not a de Polignac number, because 242978289 - 2¹ = 242978287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242978287) 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, 2131332 + ... + 2131445.

It is an arithmetic number, because the mean of its divisors is an integer number (42627780).

Almost surely, 2^242978289 is an apocalyptic number.

It is an amenable number.

242978289 is a deficient number, since it is larger than the sum of its proper divisors (98043951).

242978289 is a wasteful number, since it uses less digits than its factorization.

242978289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4262799.

The product of its digits is 1161216, while the sum is 51.

The square root of 242978289 is about 15587.7608719149. The cubic root of 242978289 is about 624.0065617119.

The spelling of 242978289 in words is "two hundred forty-two million, nine hundred seventy-eight thousand, two hundred eighty-nine".