22070720 has 112 divisors (see below), whose sum is σ = 61447680. Its totient is φ = 7394304.

The previous prime is 22070717. The next prime is 22070753. The reversal of 22070720 is 2707022.

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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 22070692 and 22070701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132077 + ... + 132243.

It is an arithmetic number, because the mean of its divisors is an integer number (548640).

Almost surely, 2^22070720 is an apocalyptic number.

22070720 is a gapful number since it is divisible by the number (20) 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 22070720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30723840).

22070720 is an abundant number, since it is smaller than the sum of its proper divisors (39376960).

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

22070720 is a wasteful number, since it uses less digits than its factorization.

22070720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 22070720 is about 4697.9484884362. The cubic root of 22070720 is about 280.5038546840.

Adding to 22070720 its reverse (2707022), we get a palindrome (24777742).

The spelling of 22070720 in words is "twenty-two million, seventy thousand, seven hundred twenty".