242778 has 16 divisors (see below), whose sum is σ = 497376. Its totient is φ = 78960.

The previous prime is 242773. The next prime is 242779. The reversal of 242778 is 877242.

It is not an unprimeable number, because it can be changed into a prime (242773) by changing a digit.

242778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213 + ... + 728.

It is an arithmetic number, because the mean of its divisors is an integer number (31086).

2²⁴²⁷⁷⁸ is an apocalyptic number.

242778 is an abundant number, since it is smaller than the sum of its proper divisors (254598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242778 is a wasteful number, since it uses less digits than its factorization.

242778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989.

The product of its digits is 6272, while the sum is 30.

The square root of 242778 is about 492.7250754731. The cubic root of 242778 is about 62.3835056667.

The spelling of 242778 in words is "two hundred forty-two thousand, seven hundred seventy-eight".