242721392 has 20 divisors (see below), whose sum is σ = 490720080. Its totient is φ = 116083968.

The previous prime is 242721373. The next prime is 242721407. The reversal of 242721392 is 293127242.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329417 + ... + 330152.

It is an arithmetic number, because the mean of its divisors is an integer number (24536004).

Almost surely, 2^242721392 is an apocalyptic number.

It is an amenable number.

242721392 is an abundant number, since it is smaller than the sum of its proper divisors (247998688).

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

242721392 is a wasteful number, since it uses less digits than its factorization.

242721392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659600 (or 659594 counting only the distinct ones).

The product of its digits is 12096, while the sum is 32.

The square root of 242721392 is about 15579.5183494227. The cubic root of 242721392 is about 623.7865668259.

The spelling of 242721392 in words is "two hundred forty-two million, seven hundred twenty-one thousand, three hundred ninety-two".