22378849 has 2 divisors, whose sum is σ = 22378850. Its totient is φ = 22378848.

The previous prime is 22378843. The next prime is 22378921. The reversal of 22378849 is 94887322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18147600 + 4231249 = 4260^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 22378849 - 2¹¹ = 22376801 is a prime.

It is not a weakly prime, because it can be changed into another prime (22378843) 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 as a sum of consecutive naturals, namely, 11189424 + 11189425.

It is an arithmetic number, because the mean of its divisors is an integer number (11189425).

Almost surely, 2^22378849 is an apocalyptic number.

It is an amenable number.

22378849 is a deficient number, since it is larger than the sum of its proper divisors (1).

22378849 is an equidigital number, since it uses as much as digits as its factorization.

22378849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 43.

The square root of 22378849 is about 4730.6288165528. The cubic root of 22378849 is about 281.8031966900.

The spelling of 22378849 in words is "twenty-two million, three hundred seventy-eight thousand, eight hundred forty-nine".