30022720 has 112 divisors (see below), whose sum is σ = 88075008. Its totient is φ = 9492480.

The previous prime is 30022709. The next prime is 30022721. The reversal of 30022720 is 2722003.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 30022694 and 30022703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30022721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28605 + ... + 29635.

It is an arithmetic number, because the mean of its divisors is an integer number (786384).

Almost surely, 2^30022720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30022720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44037504).

30022720 is an abundant number, since it is smaller than the sum of its proper divisors (58052288).

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

30022720 is a wasteful number, since it uses less digits than its factorization.

30022720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 30022720 is about 5479.2992252659. The cubic root of 30022720 is about 310.8016711603.

Adding to 30022720 its reverse (2722003), we get a palindrome (32744723).

The spelling of 30022720 in words is "thirty million, twenty-two thousand, seven hundred twenty".