242778887 has 16 divisors (see below), whose sum is σ = 285772032. Its totient is φ = 204111360.

The previous prime is 242778881. The next prime is 242778889. The reversal of 242778887 is 788877242.

It is a cyclic number.

It is not a de Polignac number, because 242778887 - 2⁴ = 242778871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242778881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10868 + ... + 24569.

It is an arithmetic number, because the mean of its divisors is an integer number (17860752).

Almost surely, 2^242778887 is an apocalyptic number.

242778887 is a deficient number, since it is larger than the sum of its proper divisors (42993145).

242778887 is a wasteful number, since it uses less digits than its factorization.

242778887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35498.

The product of its digits is 2809856, while the sum is 53.

The square root of 242778887 is about 15581.3634512516. The cubic root of 242778887 is about 623.8358164022.

The spelling of 242778887 in words is "two hundred forty-two million, seven hundred seventy-eight thousand, eight hundred eighty-seven".