222605440 has 32 divisors (see below), whose sum is σ = 532167660. Its totient is φ = 89041920.

The previous prime is 222605417. The next prime is 222605447. The reversal of 222605440 is 44506222.

It can be written as a sum of positive squares in 2 ways, for example, as 206669376 + 15936064 = 14376^2 + 3992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (222605447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173271 + ... + 174550.

Almost surely, 2^222605440 is an apocalyptic number.

222605440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222605440 is an abundant number, since it is smaller than the sum of its proper divisors (309562220).

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

222605440 is an equidigital number, since it uses as much as digits as its factorization.

222605440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347840 (or 347828 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 222605440 is about 14919.9678283835. The cubic root of 222605440 is about 606.0548407856.

The spelling of 222605440 in words is "two hundred twenty-two million, six hundred five thousand, four hundred forty".