240442220 has 48 divisors (see below), whose sum is σ = 536699520. Its totient is φ = 90482432.

The previous prime is 240442201. The next prime is 240442229. The reversal of 240442220 is 22244042.

It is a super-2 number, since 2×240442220² = 115624922317056800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 240442192 and 240442201.

It is not an unprimeable number, because it can be changed into a prime (240442229) 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, 97037 + ... + 99483.

It is an arithmetic number, because the mean of its divisors is an integer number (11181240).

Almost surely, 2^240442220 is an apocalyptic number.

240442220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240442220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268349760).

240442220 is an abundant number, since it is smaller than the sum of its proper divisors (296257300).

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

240442220 is a wasteful number, since it uses less digits than its factorization.

240442220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 240442220 is about 15506.1994053991. The cubic root of 240442220 is about 621.8279559877.

Adding to 240442220 its reverse (22244042), we get a palindrome (262686262).

The spelling of 240442220 in words is "two hundred forty million, four hundred forty-two thousand, two hundred twenty".