220222440 has 48 divisors (see below), whose sum is σ = 715724100. Its totient is φ = 58725888.

The previous prime is 220222417. The next prime is 220222451. The reversal of 220222440 is 44222022.

220222440 is a `hidden beast` number, since 2 + 2 + 0 + 222 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 219810276 + 412164 = 14826^2 + 642^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305505 + ... + 306224.

Almost surely, 2^220222440 is an apocalyptic number.

220222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220222440 is an abundant number, since it is smaller than the sum of its proper divisors (495501660).

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

220222440 is a wasteful number, since it uses less digits than its factorization.

220222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611746 (or 611739 counting only the distinct ones).

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

The square root of 220222440 is about 14839.8935306154. The cubic root of 220222440 is about 603.8844639617.

Adding to 220222440 its reverse (44222022), we get a palindrome (264444462).

It can be divided in two parts, 2202 and 22440, that added together give a palindrome (24642).

The spelling of 220222440 in words is "two hundred twenty million, two hundred twenty-two thousand, four hundred forty".