242809524 has 36 divisors (see below), whose sum is σ = 623835940. Its totient is φ = 79608960.

The previous prime is 242809517. The next prime is 242809529. The reversal of 242809524 is 425908242.

It can be written as a sum of positive squares in 2 ways, for example, as 60559524 + 182250000 = 7782^2 + 13500^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242809529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53089 + ... + 57480.

Almost surely, 2^242809524 is an apocalyptic number.

It is an amenable number.

242809524 is an abundant number, since it is smaller than the sum of its proper divisors (381026416).

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

242809524 is a wasteful number, since it uses less digits than its factorization.

242809524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110640 (or 110635 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 242809524 is about 15582.3465498621. The cubic root of 242809524 is about 623.8620565396.

The spelling of 242809524 in words is "two hundred forty-two million, eight hundred nine thousand, five hundred twenty-four".