242709820 has 12 divisors (see below), whose sum is σ = 509690664. Its totient is φ = 97083920.

The previous prime is 242709769. The next prime is 242709821. The reversal of 242709820 is 28907242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242709821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6067726 + ... + 6067765.

It is an arithmetic number, because the mean of its divisors is an integer number (42474222).

Almost surely, 2^242709820 is an apocalyptic number.

242709820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242709820 is an abundant number, since it is smaller than the sum of its proper divisors (266980844).

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

242709820 is a wasteful number, since it uses less digits than its factorization.

242709820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12135500 (or 12135498 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 242709820 is about 15579.1469599590. The cubic root of 242709820 is about 623.7766534394.

The spelling of 242709820 in words is "two hundred forty-two million, seven hundred nine thousand, eight hundred twenty".