22276720 has 20 divisors (see below), whose sum is σ = 51793560. Its totient is φ = 8910656.

The previous prime is 22276717. The next prime is 22276733. The reversal of 22276720 is 2767222.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139150 + ... + 139309.

It is an arithmetic number, because the mean of its divisors is an integer number (2589678).

Almost surely, 2^22276720 is an apocalyptic number.

22276720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22276720 is an abundant number, since it is smaller than the sum of its proper divisors (29516840).

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

22276720 is a wasteful number, since it uses less digits than its factorization.

22276720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278472 (or 278466 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 22276720 is about 4719.8220305431. The cubic root of 22276720 is about 281.3738601775.

It can be divided in two parts, 2 and 2276720, that added together give a palindrome (2276722).

The spelling of 22276720 in words is "twenty-two million, two hundred seventy-six thousand, seven hundred twenty".