30222420 has 24 divisors (see below), whose sum is σ = 84622944. Its totient is φ = 8059296.

The previous prime is 30222397. The next prime is 30222431. The reversal of 30222420 is 2422203.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 30222420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251794 + ... + 251913.

It is an arithmetic number, because the mean of its divisors is an integer number (3525956).

Almost surely, 2^30222420 is an apocalyptic number.

30222420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30222420 is an abundant number, since it is smaller than the sum of its proper divisors (54400524).

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

30222420 is a wasteful number, since it uses less digits than its factorization.

30222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503719 (or 503717 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 30222420 is about 5497.4921555196. The cubic root of 30222420 is about 311.4892613615.

Adding to 30222420 its reverse (2422203), we get a palindrome (32644623).

It can be divided in two parts, 302 and 22420, that added together give a palindrome (22722).

The spelling of 30222420 in words is "thirty million, two hundred twenty-two thousand, four hundred twenty".