222222420 has 96 divisors (see below), whose sum is σ = 790137600. Its totient is φ = 50792832.

The previous prime is 222222401. The next prime is 222222431. The reversal of 222222420 is 24222222.

It is a happy number.

222222420 is a `hidden beast` number, since 2 + 22 + 222 + 420 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 222222393 and 222222402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25615 + ... + 33174.

It is an arithmetic number, because the mean of its divisors is an integer number (8230600).

Almost surely, 2^222222420 is an apocalyptic number.

222222420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222420 is an abundant number, since it is smaller than the sum of its proper divisors (567915180).

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

222222420 is a wasteful number, since it uses less digits than its factorization.

222222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58814 (or 58806 counting only the distinct ones).

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

The square root of 222222420 is about 14907.1264836655. The cubic root of 222222420 is about 605.7070439704.

Adding to 222222420 its reverse (24222222), we get a palindrome (246444642).

It can be divided in two parts, 22222 and 2420, that added together give a palindrome (24642).

The spelling of 222222420 in words is "two hundred twenty-two million, two hundred twenty-two thousand, four hundred twenty".