30222432 has 72 divisors (see below), whose sum is σ = 86879520. Its totient is φ = 9964800.

The previous prime is 30222431. The next prime is 30222443. The reversal of 30222432 is 23422203.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30222431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28569 + ... + 29607.

It is an arithmetic number, because the mean of its divisors is an integer number (1206660).

Almost surely, 2^30222432 is an apocalyptic number.

30222432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30222432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43439760).

30222432 is an abundant number, since it is smaller than the sum of its proper divisors (56657088).

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

30222432 is a wasteful number, since it uses less digits than its factorization.

30222432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156 (or 1145 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 30222432 is about 5497.4932469263. The cubic root of 30222432 is about 311.4893025878.

Adding to 30222432 its reverse (23422203), we get a palindrome (53644635).

The spelling of 30222432 in words is "thirty million, two hundred twenty-two thousand, four hundred thirty-two".