242780340 has 48 divisors (see below), whose sum is σ = 741585600. Its totient is φ = 58855680.

The previous prime is 242780327. The next prime is 242780353. The reversal of 242780340 is 43087242.

It is an interprime number because it is at equal distance from previous prime (242780327) and next prime (242780353).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 242780298 and 242780307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183265 + ... + 184584.

It is an arithmetic number, because the mean of its divisors is an integer number (15449700).

Almost surely, 2^242780340 is an apocalyptic number.

242780340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242780340 is an abundant number, since it is smaller than the sum of its proper divisors (498805260).

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

242780340 is a wasteful number, since it uses less digits than its factorization.

242780340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367872 (or 367870 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 242780340 is about 15581.4100773967. The cubic root of 242780340 is about 623.8370609251.

The spelling of 242780340 in words is "two hundred forty-two million, seven hundred eighty thousand, three hundred forty".