242875640 has 32 divisors (see below), whose sum is σ = 624538080. Its totient is φ = 83271552.

The previous prime is 242875621. The next prime is 242875643. The reversal of 242875640 is 46578242.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 242875594 and 242875603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242875643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433427 + ... + 433986.

It is an arithmetic number, because the mean of its divisors is an integer number (19516815).

Almost surely, 2^242875640 is an apocalyptic number.

242875640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242875640 is an abundant number, since it is smaller than the sum of its proper divisors (381662440).

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

242875640 is a wasteful number, since it uses less digits than its factorization.

242875640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867431 (or 867427 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 242875640 is about 15584.4679087866. The cubic root of 242875640 is about 623.9186763951.

The spelling of 242875640 in words is "two hundred forty-two million, eight hundred seventy-five thousand, six hundred forty".