222788420 has 24 divisors (see below), whose sum is σ = 470960448. Its totient is φ = 88524000.

The previous prime is 222788407. The next prime is 222788429. The reversal of 222788420 is 24887222.

It is not an unprimeable number, because it can be changed into a prime (222788429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33866 + ... + 39905.

It is an arithmetic number, because the mean of its divisors is an integer number (19623352).

Almost surely, 2^222788420 is an apocalyptic number.

222788420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222788420 is an abundant number, since it is smaller than the sum of its proper divisors (248172028).

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

222788420 is a wasteful number, since it uses less digits than its factorization.

222788420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73931 (or 73929 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 222788420 is about 14926.0986195322. The cubic root of 222788420 is about 606.2208528163.

The spelling of 222788420 in words is "two hundred twenty-two million, seven hundred eighty-eight thousand, four hundred twenty".