220240040 has 16 divisors (see below), whose sum is σ = 495540180. Its totient is φ = 88096000.

The previous prime is 220240037. The next prime is 220240057. The reversal of 220240040 is 40042022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 197065444 + 23174596 = 14038^2 + 4814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220239997 and 220240024.

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, 2752961 + ... + 2753040.

Almost surely, 2^220240040 is an apocalyptic number.

220240040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220240040 is an abundant number, since it is smaller than the sum of its proper divisors (275300140).

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

220240040 is a wasteful number, since it uses less digits than its factorization.

220240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506012 (or 5506008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 220240040 is about 14840.4865149361. The cubic root of 220240040 is about 603.9005508531.

Adding to 220240040 its reverse (40042022), we get a palindrome (260282062).

The spelling of 220240040 in words is "two hundred twenty million, two hundred forty thousand, forty".