22378445 has 4 divisors (see below), whose sum is σ = 26854140. Its totient is φ = 17902752.

The previous prime is 22378441. The next prime is 22378481. The reversal of 22378445 is 54487322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14969161 + 7409284 = 3869^2 + 2722^2 .

It is a cyclic number.

It is not a de Polignac number, because 22378445 - 2² = 22378441 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22378441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237840 + ... + 2237849.

It is an arithmetic number, because the mean of its divisors is an integer number (6713535).

Almost surely, 2^22378445 is an apocalyptic number.

It is an amenable number.

22378445 is a deficient number, since it is larger than the sum of its proper divisors (4475695).

22378445 is an equidigital number, since it uses as much as digits as its factorization.

22378445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4475694.

The product of its digits is 53760, while the sum is 35.

The square root of 22378445 is about 4730.5861159057. The cubic root of 22378445 is about 281.8015009046.

The spelling of 22378445 in words is "twenty-two million, three hundred seventy-eight thousand, four hundred forty-five".