242749856 has 24 divisors (see below), whose sum is σ = 478328004. Its totient is φ = 121269760.

The previous prime is 242749853. The next prime is 242749873. The reversal of 242749856 is 658947242.

It can be written as a sum of positive squares in 2 ways, for example, as 242736400 + 13456 = 15580^2 + 116^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 242749856.

It is not an unprimeable number, because it can be changed into a prime (242749853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45236 + ... + 50316.

Almost surely, 2^242749856 is an apocalyptic number.

It is an amenable number.

242749856 is a deficient number, since it is larger than the sum of its proper divisors (235578148).

242749856 is a wasteful number, since it uses less digits than its factorization.

242749856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584 (or 6576 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The square root of 242749856 is about 15580.4318297023. The cubic root of 242749856 is about 623.8109497431.

The spelling of 242749856 in words is "two hundred forty-two million, seven hundred forty-nine thousand, eight hundred fifty-six".