22773280 has 48 divisors (see below), whose sum is σ = 54091800. Its totient is φ = 9060352.

The previous prime is 22773277. The next prime is 22773281. The reversal of 22773280 is 8237722.

It can be written as a sum of positive squares in 4 ways, for example, as 13749264 + 9024016 = 3708^2 + 3004^2 .

It is not an unprimeable number, because it can be changed into a prime (22773281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50496 + ... + 50944.

Almost surely, 2^22773280 is an apocalyptic number.

22773280 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 22773280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27045900).

22773280 is an abundant number, since it is smaller than the sum of its proper divisors (31318520).

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

22773280 is a wasteful number, since it uses less digits than its factorization.

22773280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 22773280 is about 4772.1357901887. The cubic root of 22773280 is about 283.4491737012.

The spelling of 22773280 in words is "twenty-two million, seven hundred seventy-three thousand, two hundred eighty".