242806540 has 48 divisors (see below), whose sum is σ = 521240832. Its totient is φ = 94986176.

The previous prime is 242806523. The next prime is 242806549. The reversal of 242806540 is 45608242.

It is not an unprimeable number, because it can be changed into a prime (242806549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176937 + ... + 178303.

It is an arithmetic number, because the mean of its divisors is an integer number (10859184).

Almost surely, 2^242806540 is an apocalyptic number.

242806540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242806540 is an abundant number, since it is smaller than the sum of its proper divisors (278434292).

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

242806540 is a wasteful number, since it uses less digits than its factorization.

242806540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1564 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 242806540 is about 15582.2508001893. The cubic root of 242806540 is about 623.8595008847.

The spelling of 242806540 in words is "two hundred forty-two million, eight hundred six thousand, five hundred forty".