22240778 has 16 divisors (see below), whose sum is σ = 39057984. Its totient is φ = 9299040.

The previous prime is 22240769. The next prime is 22240781. The reversal of 22240778 is 87704222.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18800 + ... + 19947.

It is an arithmetic number, because the mean of its divisors is an integer number (2441124).

Almost surely, 2^22240778 is an apocalyptic number.

22240778 is a deficient number, since it is larger than the sum of its proper divisors (16817206).

22240778 is a wasteful number, since it uses less digits than its factorization.

22240778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38797.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 22240778 is about 4716.0129346727. The cubic root of 22240778 is about 281.2224527423. Note that the first 3 decimals are identical.

The spelling of 22240778 in words is "twenty-two million, two hundred forty thousand, seven hundred seventy-eight".