22778960 has 20 divisors (see below), whose sum is σ = 52961268. Its totient is φ = 9111552.

The previous prime is 22778941. The next prime is 22778969. The reversal of 22778960 is 6987722.

It can be written as a sum of positive squares in 2 ways, for example, as 13366336 + 9412624 = 3656^2 + 3068^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22778969) 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 3 ways as a sum of consecutive naturals, for example, 142289 + ... + 142448.

Almost surely, 2^22778960 is an apocalyptic number.

22778960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22778960 is an abundant number, since it is smaller than the sum of its proper divisors (30182308).

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

22778960 is a wasteful number, since it uses less digits than its factorization.

22778960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284750 (or 284744 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 22778960 is about 4772.7308744575. The cubic root of 22778960 is about 283.4727372440.

The spelling of 22778960 in words is "twenty-two million, seven hundred seventy-eight thousand, nine hundred sixty".