242220240 has 80 divisors (see below), whose sum is σ = 834321600. Its totient is φ = 64591488.

The previous prime is 242220239. The next prime is 242220257. The reversal of 242220240 is 42022242.

242220240 is a `hidden beast` number, since 2 + 422 + 2 + 0 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53910 + ... + 58229.

It is an arithmetic number, because the mean of its divisors is an integer number (10429020).

Almost surely, 2^242220240 is an apocalyptic number.

242220240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242220240 is an abundant number, since it is smaller than the sum of its proper divisors (592101360).

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

242220240 is a wasteful number, since it uses less digits than its factorization.

242220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112161 (or 112149 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 242220240 is about 15563.4263579714. The cubic root of 242220240 is about 623.3569559014.

Adding to 242220240 its reverse (42022242), we get a palindrome (284242482).

It can be divided in two parts, 2422202 and 40, that added together give a palindrome (2422242).

The spelling of 242220240 in words is "two hundred forty-two million, two hundred twenty thousand, two hundred forty".