162222720 has 128 divisors (see below), whose sum is σ = 564166080. Its totient is φ = 39321600.

The previous prime is 162222719. The next prime is 162222727. The reversal of 162222720 is 27222261.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162222727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17280 + ... + 24960.

Almost surely, 2^162222720 is an apocalyptic number.

162222720 is a gapful number since it is divisible by the number (10) 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 162222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282083040).

162222720 is an abundant number, since it is smaller than the sum of its proper divisors (401943360).

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

162222720 is a wasteful number, since it uses less digits than its factorization.

162222720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7714 (or 7702 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 162222720 is about 12736.6683241733. The cubic root of 162222720 is about 545.3858838825.

Adding to 162222720 its reverse (27222261), we get a palindrome (189444981).

It can be divided in two parts, 1622 and 22720, that added together give a palindrome (24342).

The spelling of 162222720 in words is "one hundred sixty-two million, two hundred twenty-two thousand, seven hundred twenty".